children topics are not seems to co-related with parent topic

[gauravkoradiya]

I had tried HLDA algorithm and fully drill-down it. It is not giving expected hierarchy of topic because it is not able to extract isolated topics generally. Every child of parent should co-related with each other while HLDA does not show it up. I have fitted my own logic for document weight as well as word weight in levels but problem here is that during initialization it just fixes the tree so for every iteration it just exchanges word over topic. Below example is hierarchy over 848 wiki docs in which one can't interprete child-parent relation here. What could be the possible reason?

topic 0 (level=0, total_words=316189, documents=848): political (1274), country (1094), empire (1081), city (1076), energy (1058), military (999), government (907), france (848), largest (835), china (830), language (795), displaystyle (769), philosophy (767), food (767), rights (764), economic (758), religious (757), gas (749), earth (735), nuclear (734),  == Arts:41,Everyday_life:55,Geography:91,Health_medicine_and _diesease:37,History:80,Mathematics:51,People:14,Philosophy:55,Science:183,Society_and_social_science:144,Technology:97
        topic 1 (level=1, total_words=69004, documents=219): iron (638), rock (538), german (526), language (520), city (501), latin (469), species (408), family (401), space (393), art (371), earth (368), sexual (347), carbon (341), spanish (336), game (336), music (316), red (315), government (314), religion (312), events (310),  == Arts:14,Everyday_life:14,Geography:20,Health_medicine_and _diesease:10,History:11,Mathematics:17,People:2,Philosophy:13,Science:60,Society_and_social_science:33,Technology:25
            topic 2 (level=2, total_words=7261, documents=39): tropical (207), species (204), fungi (185), city (175), reaction (164), language (157), video (156), engineering (138), peoples (119), deities (118), church (105), artificial (101), plastic (98), plants (93), country (88), chemical (88), arctic (85), home (82), game (81), ocean (81),  == Arts:3,Everyday_life:2,Geography:3,Health_medicine_and _diesease:1,History:1,Mathematics:3,Philosophy:1,Science:12,Society_and_social_science:8,Technology:5
                topic 18 (level=3, total_words=366, documents=6): species (200), organisms (60), modernist (56), energy (51), crude (47), painting (42), proteins (35), plant (34), sexual (32), chemical (29), language (26), objects (25), letter (23), abstract (23), cell (22), works (22), biological (22), waves (20), definition (20), products (19),  == Geography:1,History:1,Science:2,Society_and_social_science:2
                topic 22 (level=3, total_words=430, documents=5): wind (367), selection (159), energy (132), stone (110), tools (75), iron (74), networks (45), environment (45), company (44), gold (43), animal (42), plants (39), side (34), generation (34), genetic (34), moon (34), data (33), plant (32), food (31), carbon (31),  == Arts:1,Mathematics:1,Science:3
                topic 29 (level=3, total_words=345, documents=6): ritual (121), move (69), newton (41), extinct (38), rituals (38), play (36), white (30), position (26), food (25), player (25), heart (19), light (19), basin (18), genetic (17), species (17), positions (17), males (16), migration (15), online (15), living (15),  == Everyday_life:1,Geography:1,Science:2,Society_and_social_science:2
                topic 61 (level=3, total_words=141, documents=6): surgery (116), death (68), procedures (20), medical (16), bad (15), care (14), eternal (14), infection (11), access (10), fields (10), light (10), children (10), believed (9), faith (9), consciousness (8), judaism (8), instruments (7), christianity (7), post (7), birth (7),  == Mathematics:1,Philosophy:1,Science:2,Society_and_social_science:1,Technology:1
                topic 80 (level=3, total_words=52, documents=3): rotation (14), side (7), surface (7), syndrome (5), located (4), canadian (4), television (4), surrounding (2), attached (2), angle (2), give (2), names (2), professional (2), urbanization (2), weeks (2), compression (2), movements (2), minor (2), plane (2), treated (2),  == Everyday_life:1,Geography:1,Mathematics:1
                topic 102 (level=3, total_words=218, documents=8): space (148), sun (14), launched (14), data (14), planets (13), flight (11), technology (10), mercury (10), lunar (9), radiation (8), days (6), billion (6), distance (6), future (6), visible (5), light (5), astronomy (5), focus (5), bodies (4), april (4),  == Arts:1,Health_medicine_and _diesease:1,Science:2,Society_and_social_science:1,Technology:3
                topic 204 (level=3, total_words=60, documents=5): box (2), lifetime (2), importantly (1), principal (1), permanent (1), contamination (1), compounds (1), flowing (1), sensitive (1), gradually (1), sending (1), assumption (1), error (1), predators (1), built (1), rooms (1), mutually (1), remote (1), majority (1), tested (1),  == Arts:1,Science:1,Society_and_social_science:2,Technology:1
            topic 7 (level=2, total_words=7539, documents=14): city (477), gold (475), government (455), empire (407), memory (322), language (286), khan (260), earth (245), sleep (245), cultural (243), church (241), catholic (235), carbon (234), political (230), muscle (225), nitrogen (220), china (212), sociology (209), philippines (209), learning (208),  == Arts:1,Geography:2,History:1,Mathematics:1,Philosophy:2,Science:3,Society_and_social_science:4
                topic 97 (level=3, total_words=59, documents=5): industrial (23), manufacturing (9), sector (5), counterpart (2), mere (2), joining (2), stating (2), product (2), post (2), goods (2), promotion (1), corner (1), productivity (1), sale (1), wholly (1), mortality (1), delayed (1), working (1), police (1), triple (1),  == Arts:1,Geography:2,Society_and_social_science:2
                topic 100 (level=3, total_words=35, documents=3): electromagnetic (12), isbn (11), fields (7), directions (7), accuracy (6), instruments (6), pole (6), press (6), military (6), rays (5), earth (5), marked (5), filled (5), degree (5), poles (5), observed (5), steel (4), destination (4), mount (4), built (3),  == History:1,Science:2
                topic 280 (level=3, total_words=43, documents=3): enormous (2), teacher (2), regulating (1), emphasised (1), fifty (1), versions (1), joint (1), rings (1), procedures (1), determination (1), permanent (1), violent (1), separating (1), buddhism (1), preserve (1), discrete (1), dimension (1), travelling (1), classical (1), referring (1),  == Mathematics:1,Philosophy:2
                topic 287 (level=3, total_words=37, documents=3): implement (1), generic (1), jan (1), proposes (1), operation (1), profession (1), technological (1), gilbert (1), proper (1), emphasizes (1), commodity (1), authorities (1), empty (1), loosely (1), goals (1), valued (1), shortage (1), drives (1), analytical (1), equation (1),  == Science:1,Society_and_social_science:2
            topic 19 (level=2, total_words=2352, documents=38): chemical (51), carbon (42), evolution (37), hypothesis (36), notation (32), women (27), billion (26), suggested (24), note (23), experiments (22), playing (22), live (21), processes (21), rock (20), potential (20), genres (19), dioxide (17), reaction (17), selection (17), record (16),  == Arts:4,Everyday_life:3,Geography:5,Health_medicine_and _diesease:2,History:2,Mathematics:1,Philosophy:1,Science:9,Society_and_social_science:6,Technology:5
                topic 20 (level=3, total_words=240, documents=4): music (622), molecules (86), earth (77), organic (53), living (37), family (37), sound (37), musicians (32), males (27), cells (24), hydrogen (23), acid (23), proposed (22), composition (19), performed (17), simple (17), style (17), matter (15), generation (14), light (14),  == Arts:1,Everyday_life:1,History:1,Technology:1
                topic 104 (level=3, total_words=69, documents=5): analyzing (2), sovereign (2), efficiency (2), relates (2), essentially (2), preferred (2), covering (1), scholarship (1), prepared (1), degrees (1), interactive (1), revolutionary (1), comparative (1), subordinate (1), labor (1), preferences (1), convenient (1), table (1), planning (1), eighteenth (1),  == Arts:1,Philosophy:1,Science:1,Society_and_social_science:2
                topic 120 (level=3, total_words=34, documents=2): cinema (1), remain (1), arena (1), titled (1), viewpoint (1), revised (1), covers (1), list (1), historic (1), ball (1), regulate (1), ukraine (1), forty (1), socialist (1), edition (1), integrated (1), reverse (1), organism (1), studying (1), fastest (1),  == Geography:1,Science:1
                topic 127 (level=3, total_words=50, documents=2): stimulate (1), wet (1), republic (1), attacked (1), enforcement (1), committed (1), defending (1), tanks (1), burned (1), commander (1), eyes (1), launched (1), forcing (1), protecting (1), afford (1), bay (1), duties (1), friendly (1), woman (1), designed (1),  == Everyday_life:1,Geography:1
                topic 181 (level=3, total_words=143, documents=7): featuring (3), prolonged (3), wet (2), tests (2), prize (2), stephen (2), twenty (2), stands (2), definitive (2), passes (2), accessible (2), solution (2), indians (1), architect (1), segment (1), representations (1), offers (1), applies (1), exceeding (1), acquired (1),  == Everyday_life:1,Geography:2,Health_medicine_and _diesease:1,Mathematics:1,Science:1,Society_and_social_science:1
                topic 206 (level=3, total_words=50, documents=3): bring (2), extremely (1), evident (1), monumental (1), minutes (1), argument (1), colloquially (1), delivered (1), synonymous (1), don (1), discovery (1), training (1), belonging (1), noun (1), basin (1), imagery (1), mention (1), kinds (1), scattered (1), imply (1),  == Arts:2,Society_and_social_science:1
                topic 224 (level=3, total_words=100, documents=5): simplest (3), attract (2), dispersed (2), transition (2), measurement (2), training (2), liquids (2), micro (2), reliance (1), ritual (1), indigenous (1), weakness (1), rolling (1), naturally (1), formation (1), combination (1), invaders (1), explaining (1), ruler (1), reach (1),  == History:1,Science:2,Technology:2
                topic 264 (level=3, total_words=116, documents=8): individually (2), participating (2), considerably (2), combines (2), hard (2), popularly (2), starts (2), compared (2), britannica (2), identical (2), classification (2), characters (2), principal (1), sparked (1), continuing (1), aspects (1), silent (1), definite (1), baby (1), exceeded (1),  == Geography:1,Health_medicine_and _diesease:1,Science:4,Society_and_social_science:1,Technology:1
                topic 291 (level=3, total_words=52, documents=2): strict (2), eliminated (1), details (1), flat (1), film (1), bigger (1), experimentation (1), observing (1), eliminate (1), revolt (1), construct (1), alternatively (1), diameter (1), conclude (1), crystal (1), travel (1), represent (1), scholars (1), inexpensive (1), impose (1),  == Society_and_social_science:1,Technology:1
            topic 25 (level=2, total_words=5109, documents=33): food (350), gender (345), suicide (258), force (251), country (180), media (178), games (178), language (169), metals (169), dioxide (146), forces (132), exercise (131), foods (115), atoms (109), egyptian (97), element (95), vessels (90), economic (88), literature (83), education (83),  == Arts:2,Everyday_life:2,Geography:3,Health_medicine_and _diesease:2,History:2,Mathematics:3,People:1,Philosophy:3,Science:8,Society_and_social_science:4,Technology:3
                topic 26 (level=3, total_words=1208, documents=4): games (256), clouds (169), dream (137), women (118), egypt (115), displaystyle (108), ship (106), earth (104), metal (103), texts (102), sex (100), muhammad (88), force (83), risk (77), africa (77), atomic (76), rail (76), country (74), nations (72), men (67),  == Philosophy:1,Science:1,Technology:2
                topic 132 (level=3, total_words=47, documents=5): fresh (1), comprehensive (1), incorporates (1), missing (1), discovery (1), supplement (1), qualified (1), structures (1), fuels (1), jet (1), sequences (1), appearance (1), adhere (1), absence (1), crucial (1), processed (1), extraction (1), presenting (1), virtually (1), unrelated (1),  == Everyday_life:2,Health_medicine_and _diesease:1,History:1,Science:1
                topic 178 (level=3, total_words=50, documents=3): give (3), save (1), otto (1), rose (1), multi (1), deeply (1), legacy (1), warriors (1), virginia (1), conquer (1), commodity (1), seasonal (1), question (1), releasing (1), returns (1), apparently (1), exceed (1), simply (1), critics (1), george (1),  == Mathematics:1,People:1,Society_and_social_science:1
                topic 209 (level=3, total_words=58, documents=4): campaigns (2), degree (2), calculations (2), plane (1), hypothesis (1), representations (1), statement (1), hour (1), executed (1), circle (1), structured (1), deliberate (1), festivals (1), enemies (1), scotland (1), composite (1), details (1), trans (1), papers (1), ratios (1),  == History:1,Mathematics:1,Philosophy:1,Science:1
                topic 244 (level=3, total_words=92, documents=8): danish (3), account (2), albeit (2), relies (2), induce (2), settlers (2), recovered (2), lowest (1), inter (1), collaboration (1), web (1), theoretically (1), demonstrating (1), challenge (1), standards (1), divide (1), totally (1), treatise (1), produces (1), explanation (1),  == Arts:1,Geography:2,Health_medicine_and _diesease:1,Science:1,Society_and_social_science:2,Technology:1
                topic 252 (level=3, total_words=115, documents=7): endangered (4), spending (3), decide (2), atlas (2), virtue (2), dominated (2), selected (2), works (2), civilizations (2), symbol (1), pioneered (1), ministry (1), confusion (1), gray (1), diagram (1), economist (1), opposed (1), experiment (1), domesticated (1), runs (1),  == Arts:1,Geography:1,Philosophy:1,Science:3,Society_and_social_science:1
                topic 279 (level=3, total_words=36, documents=2): lack (2), denoted (1), rises (1), coordination (1), full (1), compare (1), safe (1), sheet (1), printed (1), allowing (1), differ (1), priest (1), behaviour (1), synthesis (1), inclusion (1), varying (1), product (1), quoted (1), conducting (1), prove (1),  == Mathematics:1,Science:1
            topic 55 (level=2, total_words=1333, documents=27): river (214), iron (168), displaystyle (41), bronze (40), sequence (23), lake (22), northern (19), bridge (17), millennium (17), severe (16), sea (15), archaeological (14), limits (14), dates (13), weapons (13), infections (13), service (12), historic (12), steel (11), technology (10),  == Arts:1,Everyday_life:3,Geography:3,History:1,Mathematics:3,People:1,Philosophy:2,Science:6,Society_and_social_science:2,Technology:5
                topic 56 (level=3, total_words=177, documents=6): chinese (69), limit (47), species (36), upper (22), lakes (19), plant (15), function (15), company (12), native (11), rates (8), section (8), adults (8), symptoms (8), names (7), longest (6), han (6), flooding (6), ports (6), ocean (6), pain (5),  == Philosophy:1,Science:3,Society_and_social_science:1,Technology:1
                topic 68 (level=3, total_words=91, documents=6): tools (8), carbon (8), working (8), india (7), proto (7), southern (7), approximate (4), artifacts (4), transition (3), empire (3), tradition (3), widespread (3), roman (3), excluding (2), jerusalem (2), hill (2), roughly (2), removal (2), combination (2), institution (2),  == Arts:1,Everyday_life:1,Geography:1,History:1,Science:1,Technology:1
                topic 103 (level=3, total_words=65, documents=4): sending (2), restore (2), sons (1), literary (1), distinguishing (1), teeth (1), transformed (1), routes (1), pointed (1), festivals (1), exact (1), oxygen (1), reached (1), prince (1), factories (1), mines (1), venice (1), differentiate (1), rooms (1), tonnes (1),  == Everyday_life:1,People:1,Philosophy:1,Technology:1
                topic 106 (level=3, total_words=72, documents=4): huge (2), sharp (2), modernity (2), resistant (2), zone (1), rich (1), twelve (1), legs (1), pump (1), compact (1), vessel (1), platform (1), effectively (1), recognised (1), ambiguous (1), opponents (1), article (1), singular (1), russell (1), attributed (1),  == Geography:1,Mathematics:1,Science:1,Technology:1
                topic 143 (level=3, total_words=39, documents=2): explosion (1), familiar (1), preserve (1), functional (1), theoretical (1), define (1), serving (1), linguistic (1), prestige (1), culminated (1), analogous (1), closely (1), mixing (1), considerably (1), latitudes (1), rose (1), complementary (1), medium (1), community (1), possessed (1),  == Geography:1,Mathematics:1
                topic 225 (level=3, total_words=90, documents=5): newspaper (2), program (2), detected (2), physicists (2), pass (2), color (2), preceding (1), piece (1), quantity (1), residential (1), senses (1), occasion (1), routes (1), attractive (1), wiley (1), businesses (1), differences (1), analogous (1), particles (1), assist (1),  == Everyday_life:1,Mathematics:1,Science:1,Society_and_social_science:1,Technology:1
            topic 64 (level=2, total_words=1063, documents=16): revolution (61), architectural (47), germany (38), styles (36), industrial (36), roman (28), art (27), africa (26), political (25), design (23), japanese (23), britain (22), military (22), stone (21), imperial (19), structures (17), pre (16), eastern (15), country (13), renaissance (13),  == Everyday_life:2,Health_medicine_and _diesease:1,History:1,Philosophy:1,Science:5,Society_and_social_science:2,Technology:4
                topic 108 (level=3, total_words=111, documents=4): identical (2), focused (2), propose (2), preference (2), medieval (2), interactions (2), hunter (2), pagan (2), striking (2), cambridge (1), maximum (1), assuming (1), subsequently (1), nearby (1), define (1), declining (1), forty (1), spread (1), allowing (1), slower (1),  == Everyday_life:1,Science:2,Technology:1
                topic 110 (level=3, total_words=101, documents=5): shell (3), model (3), broken (2), occupy (2), plan (2), distinctive (2), reflecting (2), capitals (2), refer (2), achievements (1), academy (1), advance (1), pair (1), symbols (1), exposed (1), originated (1), animal (1), tool (1), photographs (1), theater (1),  == Everyday_life:1,History:1,Philosophy:1,Science:1,Society_and_social_science:1
                topic 248 (level=3, total_words=54, documents=2): portable (2), varied (1), questioned (1), tall (1), convenient (1), timing (1), rotating (1), exchanges (1), addressed (1), track (1), popularity (1), passages (1), discovery (1), signals (1), allowing (1), describing (1), marks (1), procedures (1), devices (1), proportional (1),  == Science:1,Technology:1
                topic 277 (level=3, total_words=32, documents=3): obtaining (2), virtually (2), publications (1), rigorous (1), norwegian (1), findings (1), selling (1), commercial (1), conclusion (1), instability (1), drastically (1), curved (1), harsh (1), françois (1), rubber (1), matter (1), biological (1), combinations (1), convey (1), cardiovascular (1),  == Health_medicine_and _diesease:1,Science:1,Technology:1
                topic 289 (level=3, total_words=29, documents=2): master (1), academic (1), offering (1), earthquakes (1), handbook (1), sizes (1), definition (1), disciplines (1), bottom (1), corner (1), step (1), examining (1), discussions (1), stations (1), horizontal (1), capitalism (1), requires (1), awarded (1), awards (1), interpret (1),  == Society_and_social_science:1,Technology:1
            topic 81 (level=2, total_words=1115, documents=17): bonds (61), bonding (36), ground (26), surface (19), molecular (18), cold (18), attraction (16), orbital (16), atomic (13), clouds (12), forces (11), nuclei (11), charge (10), density (9), classification (9), crystals (9), cloud (8), describe (8), front (7), weather (7),  == Arts:1,Everyday_life:1,Geography:3,History:3,Mathematics:2,Science:4,Society_and_social_science:3
                topic 82 (level=3, total_words=147, documents=4): snow (242), air (24), seasonal (17), ions (16), temperature (14), atom (13), properties (11), accumulation (11), northern (10), models (10), pair (9), anti (8), wind (8), charged (7), crystal (6), factors (5), accumulated (5), starting (5), bound (5), give (5),  == Geography:2,History:1,Society_and_social_science:1
                topic 165 (level=3, total_words=18, documents=1): nationalism (1), dialect (1), hindu (1), kinds (1), george (1), masters (1), bear (1), differ (1), impose (1), believed (1), communicate (1), cities (1), encyclopædia (1), archaic (1), characterised (1), russian (1), ultimately (1), ancestor (1), emotions (0), egyptian (0),  == Society_and_social_science:1
                topic 207 (level=3, total_words=131, documents=7): climates (3), planets (2), speeds (2), environment (2), relationships (2), warning (2), constituents (2), equipment (2), conversely (2), psychology (2), alliances (2), stretched (2), mathematically (2), learned (1), laying (1), atoms (1), frequently (1), ultimate (1), simply (1), participation (1),  == Geography:1,History:1,Mathematics:2,Science:2,Society_and_social_science:1
                topic 211 (level=3, total_words=33, documents=2): frank (2), adhere (1), eds (1), renowned (1), legends (1), ultimate (1), stream (1), instances (1), residents (1), sake (1), compiled (1), books (1), focusing (1), bad (1), stages (1), predominant (1), george (1), hindu (1), athens (1), translated (1),  == Arts:1,History:1
                topic 255 (level=3, total_words=47, documents=3): unknown (2), choose (2), huge (1), rare (1), decay (1), searching (1), substance (1), diverse (1), iii (1), ill (1), arranged (1), analyses (1), adds (1), activities (1), absorbed (1), uniform (1), extract (1), pioneered (1), rings (1), implied (1),  == Everyday_life:1,Science:2
            topic 94 (level=2, total_words=2461, documents=35): colonies (89), islands (60), economic (26), india (22), portuguese (22), imperial (15), african (14), era (13), asia (13), land (12), roman (12), australia (11), center (10), diseases (10), belief (10), women (10), simple (10), proposed (9), studied (9), saint (9),  == Arts:2,Everyday_life:1,Geography:1,Health_medicine_and _diesease:4,Mathematics:4,Philosophy:3,Science:13,Society_and_social_science:4,Technology:3
                topic 146 (level=3, total_words=128, documents=7): calculation (2), placing (2), cardiovascular (2), protect (2), answer (2), muscle (2), variation (2), attributed (2), computers (2), personality (2), formulated (2), contributed (1), strongest (1), greatest (1), owners (1), legacy (1), judges (1), talk (1), listed (1), judge (1),  == Arts:1,Health_medicine_and _diesease:2,Mathematics:1,Philosophy:1,Society_and_social_science:2
                topic 149 (level=3, total_words=25, documents=2): vertical (1), detailed (1), demanded (1), attached (1), assumption (1), outline (1), ring (1), venus (1), trigger (1), predicted (1), january (1), combine (1), likelihood (1), proportions (1), dramatic (1), opposition (1), skill (1), principal (1), abraham (1), photographs (1),  == Arts:1,Science:1
                topic 171 (level=3, total_words=13, documents=2): offered (1), distances (1), sign (1), carefully (1), accelerated (1), split (1), clouds (1), mathematicians (1), sum (1), damage (1), boat (1), grains (1), california (1), einstein (0), egyptian (0), elder (0), elevated (0), emotional (0), edward (0), emotions (0),  == Everyday_life:1,Science:1
                topic 175 (level=3, total_words=32, documents=2): bacterial (1), sort (1), comprehensive (1), beer (1), foundations (1), fourth (1), reconstruction (1), light (1), frequently (1), governed (1), periodic (1), suppression (1), continuity (1), physiological (1), videos (1), ability (1), nova (1), overlapping (1), key (1), nomenclature (1),  == Science:2
                topic 179 (level=3, total_words=52, documents=2): williams (2), challenge (1), subjective (1), asserted (1), examined (1), worlds (1), eighteenth (1), removing (1), preferences (1), manufacturers (1), website (1), summarized (1), evolutionary (1), autonomy (1), considerably (1), define (1), preference (1), stanley (1), future (1), linked (1),  == Health_medicine_and _diesease:1,Philosophy:1
                topic 185 (level=3, total_words=77, documents=5): fit (2), curved (2), preparation (1), prove (1), linear (1), turning (1), advancements (1), twelve (1), failures (1), publishers (1), prone (1), spring (1), marks (1), satisfy (1), requires (1), elementary (1), strains (1), dangerous (1), governments (1), feet (1),  == Mathematics:2,Science:1,Technology:2
                topic 253 (level=3, total_words=73, documents=4): noting (2), einstein (2), shapes (2), background (1), prone (1), measuring (1), italian (1), simple (1), breeding (1), nations (1), migrants (1), linked (1), resemble (1), analyzing (1), road (1), quantity (1), sufficient (1), consent (1), continues (1), shorter (1),  == Mathematics:1,Science:3
                topic 257 (level=3, total_words=143, documents=7): raising (3), filled (2), fixed (2), thick (2), stem (2), abilities (2), intense (2), selection (2), goal (2), consistent (2), encyclopædia (2), versa (2), positively (2), adopted (1), reflect (1), square (1), incidence (1), crystals (1), disputed (1), charges (1),  == Health_medicine_and _diesease:1,Philosophy:1,Science:4,Technology:1
                topic 273 (level=3, total_words=30, documents=3): beans (1), living (1), famous (1), increases (1), bearing (1), motivation (1), cuts (1), efficiently (1), strike (1), allowing (1), exploited (1), weak (1), legitimacy (1), signs (1), returned (1), showing (1), require (1), explaining (1), mentions (1), separated (1),  == Geography:1,Science:1,Society_and_social_science:1
                topic 288 (level=3, total_words=7, documents=1): modifications (1), egypt (1), script (1), alan (1), circa (1), excluding (1), final (1), disputes (0), disputed (0), edward (0), efficient (0), egyptian (0), einstein (0), elder (0), elevated (0), emotional (0), emotions (0), discourse (0), directed (0), emperor (0),  == Society_and_social_science:1
        topic 4 (level=1, total_words=92094, documents=291): women (1070), china (871), chinese (774), city (720), british (686), empire (675), displaystyle (638), trade (614), largest (582), energy (558), africa (555), government (545), indian (502), music (465), museum (462), economic (455), language (438), cancer (436), education (435), art (430),  == Arts:12,Everyday_life:22,Geography:35,Health_medicine_and _diesease:19,History:30,Mathematics:14,People:4,Philosophy:16,Science:54,Society_and_social_science:49,Technology:36
            topic 5 (level=2, total_words=6026, documents=35): india (338), language (313), museums (312), tourism (204), german (186), light (181), numbers (169), displaystyle (164), market (139), conservative (135), king (131), spanish (128), space (128), bronze (124), member (119), indian (116), fuel (109), city (103), emperor (94), roman (90),  == Arts:1,Everyday_life:1,Geography:5,Health_medicine_and _diesease:3,History:3,Philosophy:4,Science:9,Society_and_social_science:4,Technology:5
                topic 85 (level=3, total_words=146, documents=5): union (134), manufacturing (58), council (49), commission (35), community (22), trade (19), treaties (19), traits (18), legislation (17), operation (14), currents (14), citizens (13), president (13), currency (12), financial (12), membership (11), internal (10), services (10), workers (9), action (9),  == Health_medicine_and _diesease:1,Philosophy:1,Science:3
                topic 192 (level=3, total_words=104, documents=7): settings (2), intense (2), sudden (2), write (2), stated (2), varies (2), traveling (1), regions (1), arabian (1), analyzing (1), views (1), studying (1), discipline (1), ages (1), magnitude (1), persecution (1), modeled (1), grew (1), greatest (1), consists (1),  == Everyday_life:1,Philosophy:1,Science:2,Society_and_social_science:2,Technology:1
                topic 197 (level=3, total_words=32, documents=3): occasionally (1), indicator (1), pace (1), feeding (1), dated (1), combined (1), burned (1), preserve (1), harder (1), quantitative (1), arrive (1), reportedly (1), balkans (1), arc (1), august (1), anglo (1), efficient (1), worse (1), desired (1), approaching (1),  == Geography:1,Technology:2
                topic 203 (level=3, total_words=139, documents=9): protects (3), deal (2), identify (2), indirect (2), tip (2), indirectly (2), ill (2), socialist (2), reproduce (2), favoured (2), discussion (2), taxation (2), fungi (2), import (2), succession (2), updated (2), acquisition (2), conjunction (1), justify (1), liquids (1),  == Geography:1,Health_medicine_and _diesease:2,History:2,Philosophy:1,Science:1,Society_and_social_science:1,Technology:1
                topic 208 (level=3, total_words=73, documents=3): website (2), plateau (2), airports (1), advantage (1), rival (1), label (1), sectors (1), governed (1), ready (1), cooking (1), extraction (1), triggered (1), underground (1), pushing (1), flood (1), rivers (1), armed (1), selective (1), unclear (1), massive (1),  == Geography:2,History:1
                topic 268 (level=3, total_words=40, documents=3): legacy (2), partly (2), lacks (1), temporal (1), rituals (1), journal (1), debate (1), reinforced (1), rivers (1), territories (1), slowly (1), argues (1), brothers (1), latest (1), retained (1), format (1), joseph (1), bibliography (1), sacrifice (1), attached (1),  == Philosophy:1,Society_and_social_science:1,Technology:1
                topic 270 (level=3, total_words=81, documents=5): festivals (2), southeastern (2), accommodate (2), degree (2), bonding (2), physiological (2), realistic (1), strengthen (1), encouraged (1), charges (1), interacting (1), dollar (1), neighbouring (1), constructed (1), consuming (1), invasions (1), influential (1), streams (1), exile (1), solving (1),  == Arts:1,Geography:1,Science:3
            topic 9 (level=2, total_words=2688, documents=9): jerusalem (395), egypt (361), music (335), women (321), party (228), city (222), wind (219), road (185), german (173), parties (157), china (145), species (144), country (140), america (129), engine (128), persian (126), blood (125), language (119), institutions (116), military (111),  == Everyday_life:1,Geography:1,Health_medicine_and _diesease:1,History:1,Mathematics:1,Science:2,Society_and_social_science:1,Technology:1
                topic 10 (level=3, total_words=88, documents=5): species (73), script (42), male (24), alcohol (18), egg (15), lungs (15), art (13), food (12), letters (12), young (11), primitive (11), islamic (11), air (11), drinking (11), living (10), laid (10), press (9), lack (9), move (8), mammals (8),  == Geography:1,Health_medicine_and _diesease:1,Mathematics:1,Science:1,Society_and_social_science:1
                topic 96 (level=3, total_words=57, documents=4): built (28), gravity (27), river (26), rock (21), constructed (16), flood (13), face (13), prevent (11), events (8), steel (7), land (6), philippines (6), list (6), city (5), dutch (5), supply (5), project (4), engineers (4), purposes (4), seasonal (4),  == Everyday_life:1,History:1,Science:1,Technology:1
            topic 11 (level=2, total_words=5687, documents=22): function (329), bangladesh (316), truth (296), opera (278), rome (269), health (235), jewish (227), lake (222), alcohol (219), peace (194), horses (189), government (183), british (179), communication (159), hong (154), pottery (150), america (145), languages (143), libraries (141), bce (129),  == Everyday_life:1,Geography:3,History:2,Mathematics:4,Philosophy:2,Science:3,Society_and_social_science:6,Technology:1
                topic 21 (level=3, total_words=503, documents=3): film (237), empire (150), disease (126), books (107), ireland (105), northern (100), germany (91), india (88), roman (87), france (82), key (79), cinema (77), americans (76), country (74), largest (72), children (72), church (67), radio (57), religious (51), mexico (51),  == Philosophy:1,Society_and_social_science:2
                topic 74 (level=3, total_words=121, documents=3): eye (98), network (66), freedom (61), web (58), theological (48), actions (45), action (36), cells (35), computer (25), mind (25), god (24), media (24), global (22), responsibility (18), ability (16), models (16), applications (16), metaphysical (16), tropical (16), practices (15),  == History:1,Mathematics:1,Science:1
                topic 145 (level=3, total_words=51, documents=4): answer (3), centralized (1), issues (1), combines (1), handed (1), denotes (1), determining (1), contract (1), framework (1), concepts (1), counted (1), prohibition (1), governance (1), protecting (1), describing (1), prove (1), description (1), eaten (1), capital (1), gifts (1),  == Everyday_life:1,Mathematics:1,Philosophy:1,Society_and_social_science:1
                topic 188 (level=3, total_words=9, documents=1): amount (1), rooted (1), motivated (1), equally (1), deeply (1), respects (1), inequality (1), sexual (1), recognize (1), electrons (0), elevated (0), efficient (0), egyptian (0), einstein (0), elder (0), emotions (0), emotional (0), emperor (0), emphasizing (0), encounter (0),  == Society_and_social_science:1
                topic 229 (level=3, total_words=73, documents=6): walter (2), solely (2), manipulation (2), solved (2), knowing (2), extending (1), yale (1), claims (1), project (1), impossible (1), dubbed (1), combat (1), coupled (1), involving (1), traveled (1), focuses (1), representations (1), boston (1), depth (1), identity (1),  == Geography:2,History:1,Mathematics:1,Science:1,Society_and_social_science:1
                topic 274 (level=3, total_words=81, documents=5): determined (3), utility (2), critically (2), tasks (2), dangerous (1), loosely (1), modernity (1), herbert (1), removing (1), retains (1), option (1), induce (1), plans (1), knowing (1), reverse (1), merged (1), finding (1), consumers (1), realized (1), scene (1),  == Geography:1,Mathematics:1,Science:1,Society_and_social_science:1,Technology:1
            topic 14 (level=2, total_words=8492, documents=27): film (491), church (361), orthodox (346), roman (251), empire (217), atlantic (211), asia (210), enlightenment (207), arab (195), numbers (193), rome (173), trade (168), bce (165), displaystyle (158), mobile (152), flowers (145), eastern (145), chinese (142), ocean (141), algae (134),  == Geography:3,Health_medicine_and _diesease:2,History:2,Mathematics:1,Philosophy:3,Science:8,Society_and_social_science:3,Technology:5
                topic 23 (level=3, total_words=387, documents=2): tang (264), slaves (250), prime (247), glass (234), lake (161), displaystyle (147), wave (138), race (108), government (98), chinese (91), real (80), emperor (79), letters (77), frac (58), ethnic (51), host (49), valley (48), temple (48), land (47), fossils (46),  == Health_medicine_and _diesease:1,Science:1
                topic 44 (level=3, total_words=431, documents=7): korean (213), protestant (123), india (113), child (79), country (73), inscriptions (60), political (50), religious (45), chemical (42), tradition (40), animals (36), china (30), son (27), indian (27), movements (25), motion (25), mention (24), theories (23), textiles (23), holy (21),  == Health_medicine_and _diesease:1,History:1,Science:1,Society_and_social_science:2,Technology:2
                topic 63 (level=3, total_words=205, documents=3): art (253), feminist (162), object (65), earth (54), rights (46), northern (37), season (36), government (34), court (33), hours (33), objects (32), painting (30), movements (27), roman (23), civilization (21), stone (20), pre (19), assistance (18), political (18), sculptures (17),  == Geography:1,Science:1,Technology:1
                topic 176 (level=3, total_words=75, documents=4): classified (2), denoted (2), thinking (2), details (1), energies (1), relevance (1), interesting (1), differently (1), treating (1), argue (1), organizing (1), spite (1), passes (1), consistently (1), declare (1), hostile (1), stating (1), textiles (1), rare (1), approximation (1),  == Geography:1,Philosophy:1,Science:2
                topic 198 (level=3, total_words=62, documents=4): resembles (3), contribute (2), component (2), arc (2), context (1), accommodate (1), conjunction (1), choice (1), extraordinary (1), transformed (1), loosely (1), françois (1), predict (1), orbital (1), george (1), sir (1), skin (1), equals (1), rich (1), synonymous (1),  == Geography:1,Science:1,Technology:2
                topic 233 (level=3, total_words=83, documents=6): dispute (2), definitive (2), missing (2), possess (2), comprise (2), reflects (2), array (2), elevated (2), demonstrated (2), organize (2), reader (1), profitable (1), gifts (1), relates (1), description (1), reflection (1), rate (1), asserted (1), changed (1), tightly (1),  == History:1,Mathematics:1,Philosophy:2,Science:2
                topic 290 (level=3, total_words=22, documents=1): commodities (1), invested (1), owner (1), taylor (1), replace (1), adjusted (1), driving (1), modernity (1), orders (1), scattered (1), handled (1), friend (1), crimes (1), lifetime (1), father (1), pace (1), profitable (1), steven (1), observing (1), quarters (1),  == Society_and_social_science:1
            topic 27 (level=2, total_words=4827, documents=33): matter (274), play (248), city (142), forest (138), medical (136), church (129), clothing (115), particles (106), ecology (104), regions (101), radiation (100), waves (92), india (82), organic (80), game (79), plane (79), energy (77), drinking (70), children (68), rules (66),  == Arts:1,Everyday_life:3,Geography:2,Health_medicine_and _diesease:2,History:5,Mathematics:1,Philosophy:1,Science:2,Society_and_social_science:11,Technology:5
                topic 28 (level=3, total_words=444, documents=3): london (525), quantum (253), wave (145), games (132), hindu (113), kingdom (100), egypt (85), empire (79), electromagnetic (78), light (69), displaystyle (59), classical (58), cells (58), verb (58), compounds (56), speakers (52), country (51), dialects (48), organisms (45), colonies (45),  == Health_medicine_and _diesease:1,History:1,Technology:1
                topic 60 (level=3, total_words=68, documents=1): medicine (149), christianity (101), light (89), carbon (80), christians (72), catholic (66), jesus (54), reactions (32), treatment (22), metal (21), bible (18), cycle (17), dependent (17), elementary (17), theories (17), disease (17), spirit (17), bacteria (15), temperature (15), fundamental (14),  == History:1
                topic 144 (level=3, total_words=31, documents=3): explored (2), consists (2), critical (1), renewable (1), operated (1), institute (1), daniel (1), experiments (1), computational (1), innovations (1), processing (1), investigate (1), count (1), design (1), length (1), positions (1), training (1), adjusted (1), expanded (1), partnership (1),  == Society_and_social_science:1,Technology:2
                topic 158 (level=3, total_words=79, documents=3): sustainability (2), represents (2), environmental (1), surviving (1), fragments (1), flat (1), damage (1), disruption (1), push (1), stream (1), displayed (1), award (1), bear (1), expected (1), iii (1), directions (1), driving (1), powered (1), repair (1), inadequate (1),  == Geography:1,Science:1,Technology:1
                topic 219 (level=3, total_words=41, documents=2): destroy (2), finished (2), venice (1), april (1), motivation (1), motivated (1), scholar (1), trading (1), incorporated (1), guidance (1), arrangements (1), housing (1), charles (1), elder (1), medieval (1), separation (1), deliberate (1), removal (1), failures (1), judge (1),  == History:1,Society_and_social_science:1
                topic 223 (level=3, total_words=38, documents=3): karl (2), depth (2), pointed (2), function (1), propaganda (1), francis (1), primitive (1), empirical (1), encouraged (1), deliberate (1), personality (1), grant (1), detected (1), reader (1), politically (1), antonio (1), masters (1), coherent (1), marx (1), supposed (1),  == Arts:1,Mathematics:1,Society_and_social_science:1
                topic 234 (level=3, total_words=151, documents=9): adam (2), overlapping (2), closely (2), dropping (2), explanations (2), applies (2), founding (2), convert (2), tanks (2), ordered (2), platform (2), contrasted (2), lot (2), smith (2), claim (2), citing (2), advocate (2), manner (1), heard (1), ronald (1),  == Everyday_life:1,Health_medicine_and _diesease:1,Philosophy:1,Society_and_social_science:5,Technology:1
                topic 249 (level=3, total_words=141, documents=9): navigation (2), combining (2), occurrence (2), regarded (2), translated (2), governed (2), dubbed (2), site (2), circa (2), disputes (2), bernard (2), mars (2), parents (2), detailed (2), invited (1), enabling (1), fathers (1), complicated (1), communications (1), prisoners (1),  == Everyday_life:2,Geography:1,History:2,Science:1,Society_and_social_science:3
            topic 38 (level=2, total_words=3105, documents=55): motor (225), electric (105), speed (82), design (52), star (42), permanent (35), phase (33), radiation (32), maximum (31), efficiency (27), force (26), expected (24), core (24), solution (23), displaystyle (22), pole (22), poles (21), angular (19), run (19), circuit (18),  == Arts:6,Everyday_life:6,Geography:8,Health_medicine_and _diesease:5,History:5,Mathematics:4,Philosophy:1,Science:10,Society_and_social_science:5,Technology:5
                topic 39 (level=3, total_words=84, documents=4): geometry (15), problems (11), bce (10), properties (10), applications (8), egypt (7), probability (7), metal (6), isbn (6), counting (6), materials (6), structures (6), computer (5), mathematical (5), objects (5), styles (5), beds (5), wooden (4), numbers (4), test (4),  == Science:3,Society_and_social_science:1
                topic 78 (level=3, total_words=169, documents=6): event (51), gravitational (41), gravity (20), rotating (18), compact (14), ray (14), escape (10), image (9), classical (9), orbit (9), charged (7), data (7), reach (7), proportional (7), volume (7), principle (7), appears (6), gas (6), view (6), predicted (6),  == Geography:1,History:2,Mathematics:1,Society_and_social_science:1,Technology:1
                topic 101 (level=3, total_words=114, documents=5): electrical (18), gap (15), operation (13), drive (12), electronic (11), universal (11), computer (11), variable (11), frequency (11), practical (10), wire (10), ring (9), conventional (8), performance (7), copper (7), compared (7), powered (6), requires (6), move (6), distance (5),  == Arts:2,Geography:1,History:1,Science:1
                topic 137 (level=3, total_words=94, documents=5): aware (2), studying (2), magic (2), opportunity (2), receiving (2), communication (2), precision (2), explore (2), switched (2), rituals (1), integral (1), assumed (1), pronounced (1), simple (1), removal (1), slowed (1), marshall (1), explanation (1), customary (1), scope (1),  == Everyday_life:2,Health_medicine_and _diesease:1,Science:1,Society_and_social_science:1
                topic 173 (level=3, total_words=82, documents=5): spelling (2), composite (2), successive (2), wind (2), invaders (2), los (2), explored (1), subtropical (1), election (1), strategic (1), symbol (1), partly (1), judicial (1), mainland (1), restrictions (1), mathematician (1), cooperation (1), tests (1), triangle (1), stronger (1),  == Everyday_life:1,Geography:1,Mathematics:1,Society_and_social_science:1,Technology:1
                topic 184 (level=3, total_words=99, documents=5): consuming (2), filled (2), applications (2), boats (2), suited (1), varied (1), import (1), hybrid (1), investments (1), killed (1), subsequently (1), careful (1), connecting (1), waters (1), symbol (1), comprise (1), completion (1), metres (1), ernst (1), method (1),  == History:1,Mathematics:1,Science:1,Technology:2
                topic 190 (level=3, total_words=142, documents=7): socio (3), believed (3), pursuit (3), teacher (2), confused (2), curve (2), dance (2), founded (2), academic (2), tract (2), outer (2), neolithic (2), permanently (2), adapt (2), engaged (2), push (1), attractive (1), permit (1), sodium (1), studied (1),  == Geography:1,Health_medicine_and _diesease:1,History:1,Philosophy:1,Science:3
                topic 226 (level=3, total_words=101, documents=2): changed (2), elaborate (2), improved (1), subjects (1), movable (1), codified (1), normal (1), standardized (1), driving (1), achievements (1), entitled (1), fees (1), cutting (1), tended (1), pioneered (1), intensive (1), thomas (1), leader (1), suppressed (1), funding (1),  == Geography:1,Health_medicine_and _diesease:1
                topic 228 (level=3, total_words=60, documents=4): explanations (2), faster (2), lose (2), exception (2), assumed (1), nasa (1), heat (1), taste (1), feed (1), remote (1), baby (1), automatic (1), test (1), seeking (1), predators (1), apparently (1), equator (1), energies (1), exploitation (1), mechanics (1),  == Everyday_life:2,Geography:1,Science:1
                topic 246 (level=3, total_words=91, documents=6): synonymous (3), diagram (2), performs (2), directed (2), successive (2), actual (1), involvement (1), replaced (1), del (1), harry (1), spin (1), shifts (1), kinds (1), animals (1), accelerated (1), convenient (1), label (1), estate (1), nationalist (1), nova (1),  == Arts:2,Everyday_life:1,Geography:1,Mathematics:1,Technology:1
                topic 272 (level=3, total_words=124, documents=6): planet (2), dying (2), daughter (2), break (2), invited (2), aspects (2), kinds (2), commissioned (2), incorporating (2), induce (2), wholly (2), attend (2), happy (2), terminology (2), harmony (2), colleagues (2), advertising (1), afford (1), solids (1), steven (1),  == Arts:2,Geography:1,Health_medicine_and _diesease:2,Society_and_social_science:1
            topic 40 (level=2, total_words=3804, documents=31): species (225), byzantine (201), empire (194), industrial (183), sexual (171), sea (168), chinese (168), revolution (138), justice (125), frac (116), america (114), evolution (114), script (113), constantinople (95), sides (85), civilizations (78), selection (73), china (56), japanese (55), learning (53),  == Everyday_life:1,Geography:3,History:6,Mathematics:1,Philosophy:1,Science:8,Society_and_social_science:6,Technology:5
                topic 67 (level=3, total_words=294, documents=6): iron (106), britain (89), cotton (84), industry (50), engine (34), labour (30), engines (29), india (26), built (24), working (22), growth (21), france (19), metal (19), supply (19), machines (18), steel (18), class (18), invented (18), children (17), allowed (17),  == History:1,Science:1,Society_and_social_science:1,Technology:3
                topic 116 (level=3, total_words=158, documents=7): restored (2), quarters (2), precious (2), reversed (2), acted (2), column (2), coasts (2), originated (2), promised (2), austrian (2), thin (2), destroyed (2), suffered (2), raised (2), adjacent (2), offered (2), recognizes (2), shallow (1), contents (1), relative (1),  == Everyday_life:1,Geography:2,History:3,Society_and_social_science:1
                topic 265 (level=3, total_words=116, documents=7): nickel (3), implied (3), rapidly (2), identify (2), locally (2), proportions (2), encompass (2), survival (2), gathered (2), light (2), data (2), circles (2), witnessed (2), centers (1), supporters (1), integral (1), reflect (1), items (1), conceptual (1), accompanied (1),  == History:1,Mathematics:1,Philosophy:1,Science:4
                topic 275 (level=3, total_words=41, documents=3): agreements (2), complicated (2), friction (2), diminished (2), knew (1), renaissance (1), sum (1), aggressive (1), calculate (1), automatically (1), assembly (1), implement (1), army (1), mathematically (1), transform (1), pace (1), proportional (1), attributes (1), hostile (1), rank (1),  == Geography:1,History:1,Technology:1
                topic 281 (level=3, total_words=119, documents=3): uniquely (2), leaving (2), wilson (2), enable (2), operation (2), peace (2), dimensions (2), understanding (2), expressed (2), market (2), moral (1), settlers (1), shared (1), choosing (1), believed (1), buy (1), definitions (1), domesticated (1), equal (1), arisen (1),  == Science:1,Society_and_social_science:2
                topic 282 (level=3, total_words=47, documents=3): atmospheric (1), analyzed (1), negatively (1), publishing (1), infrastructure (1), govern (1), raw (1), implemented (1), adopt (1), additional (1), credit (1), ground (1), double (1), rainfall (1), reporting (1), shifts (1), decide (1), reversed (1), processing (1), alfred (1),  == Science:1,Society_and_social_science:2
                topic 285 (level=3, total_words=9, documents=1): hypothetical (1), realm (1), induced (1), analytical (1), satisfy (1), quantum (1), partial (1), discovery (1), deeper (1), elevated (0), efficient (0), egyptian (0), einstein (0), elder (0), electrons (0), edward (0), emotions (0), emperor (0), emphasizing (0), encounter (0),  == Science:1
                topic 292 (level=3, total_words=16, documents=1): reasons (1), tied (1), dry (1), aged (1), economically (1), favored (1), architectural (1), enhance (1), colored (1), reinforced (1), finished (1), lateral (1), row (1), concrete (1), tolerance (1), avoid (1), edward (0), efficient (0), egyptian (0), discussed (0),  == Technology:1
            topic 42 (level=2, total_words=3210, documents=41): light (92), asia (75), empire (64), secular (54), leaves (52), text (50), oil (49), earth (49), green (48), babylonian (42), africa (42), spread (39), blue (33), eurasia (33), milk (31), distance (30), dynasty (29), nile (29), works (27), china (26),  == Everyday_life:2,Geography:4,Health_medicine_and _diesease:2,History:4,Mathematics:2,People:2,Philosophy:2,Science:7,Society_and_social_science:8,Technology:8
                topic 43 (level=3, total_words=200, documents=4): design (43), building (42), religion (36), china (34), post (34), jerusalem (32), hebrew (30), risk (27), disease (22), adults (21), orthodox (18), ages (18), silk (17), air (16), passages (15), complete (15), acute (15), eastern (15), empires (15), scholars (14),  == Geography:1,People:1,Technology:2
                topic 90 (level=3, total_words=206, documents=7): light (228), travel (24), electromagnetic (23), relativity (22), wave (20), metre (17), finite (16), astronomical (14), space (13), medium (13), reference (13), travelled (9), distances (8), emitted (7), takes (7), particle (7), direction (7), particles (7), theories (6), move (6),  == Everyday_life:1,Geography:2,Mathematics:1,Science:1,Society_and_social_science:2
                topic 136 (level=3, total_words=41, documents=2): resolved (2), routine (2), warning (1), weak (1), minute (1), dozen (1), suspected (1), decorative (1), beta (1), losses (1), eye (1), preference (1), ecosystem (1), susceptible (1), bird (1), raising (1), avoiding (1), originally (1), intensive (1), oceanic (1),  == Health_medicine_and _diesease:1,Science:1
                topic 177 (level=3, total_words=84, documents=5): harder (2), tip (2), determines (1), drug (1), comparable (1), talk (1), cluster (1), modeled (1), ronald (1), instructions (1), categories (1), explored (1), falls (1), constructing (1), confirmed (1), viable (1), division (1), sake (1), safety (1), donald (1),  == Science:2,Society_and_social_science:1,Technology:2
                topic 182 (level=3, total_words=278, documents=4): monetary (3), refused (2), amounts (2), meeting (2), engaged (2), commonwealth (2), achievements (2), approval (2), producing (2), ally (2), seemingly (2), technically (2), april (2), justified (2), met (2), training (2), battles (2), prevent (2), governmental (2), fell (2),  == Health_medicine_and _diesease:1,History:1,People:1,Society_and_social_science:1
                topic 247 (level=3, total_words=107, documents=6): introduce (3), deeper (2), prosperity (2), stronger (2), scientist (2), switzerland (2), raising (2), lasted (2), represents (2), hungary (1), timing (1), supreme (1), deliberate (1), moved (1), originates (1), structured (1), latest (1), completion (1), northwest (1), debate (1),  == Geography:1,History:1,Philosophy:1,Society_and_social_science:3
                topic 266 (level=3, total_words=72, documents=5): formula (1), cave (1), modernity (1), hunting (1), staple (1), feudal (1), base (1), call (1), childhood (1), calculation (1), expelled (1), historically (1), portal (1), fruits (1), conceived (1), spirits (1), mathematicians (1), arrival (1), reflect (1), assumed (1),  == Everyday_life:1,History:1,Mathematics:1,Philosophy:1,Technology:1
                topic 271 (level=3, total_words=60, documents=5): bacterial (2), acid (1), edition (1), conjunction (1), explorer (1), heavy (1), apparently (1), details (1), arrangement (1), animal (1), spot (1), characteristics (1), gift (1), designation (1), occurring (1), replacement (1), tightly (1), arisen (1), note (1), spreading (1),  == History:1,Science:2,Society_and_social_science:1,Technology:1
                topic 284 (level=3, total_words=51, documents=3): liquids (2), theoretically (2), steel (2), mixing (1), addresses (1), influenced (1), block (1), empirical (1), combined (1), assumption (1), full (1), questioned (1), designed (1), commercially (1), incorporated (1), depends (1), spatial (1), implementation (1), susceptible (1), extended (1),  == Science:1,Technology:2
            topic 76 (level=2, total_words=1900, documents=38): bands (49), music (14), combination (8), bring (8), recognized (7), closely (7), perspectives (7), active (7), depends (7), style (7), cited (7), center (6), events (6), response (6), prosperity (6), maintain (6), colony (6), offered (6), lasting (6), records (6),  == Arts:4,Everyday_life:7,Geography:6,Health_medicine_and _diesease:4,History:2,People:2,Philosophy:2,Science:5,Society_and_social_science:5,Technology:1
                topic 77 (level=3, total_words=118, documents=6): band (26), music (21), pop (13), arrangements (7), sections (6), dance (4), library (4), york (4), commercial (4), america (4), section (3), knowledge (3), railway (3), audiences (3), folk (2), britain (2), gene (2), recognized (2), definitions (2), prohibition (2),  == Everyday_life:3,Geography:1,Health_medicine_and _diesease:2
                topic 112 (level=3, total_words=88, documents=5): wikimedia (2), falling (2), transmitted (2), traditions (1), elevated (1), influential (1), drew (1), americas (1), interested (1), dedicated (1), histories (1), neo (1), add (1), positively (1), populous (1), hour (1), trace (1), degree (1), covers (1), william (1),  == Arts:2,Everyday_life:1,Health_medicine_and _diesease:1,Society_and_social_science:1
                topic 153 (level=3, total_words=227, documents=7): explored (4), facilitated (4), begun (3), hostile (3), occupy (3), working (2), william (2), capitals (2), analyze (2), indirect (2), printing (2), depend (2), richest (2), undergone (2), awards (2), stephen (2), abandoned (2), varied (2), ancestral (2), defence (2),  == Arts:1,Geography:2,History:1,Philosophy:1,Science:2
                topic 162 (level=3, total_words=170, documents=7): sudden (3), assert (2), coined (2), employ (2), sanskrit (2), primitive (2), scotland (2), evolve (2), agency (2), creator (2), afford (2), encouraged (2), knowing (2), beings (2), summary (2), buddhism (2), interpret (2), commitment (2), activity (2), experience (2),  == Arts:1,Everyday_life:1,Geography:1,People:1,Philosophy:1,Society_and_social_science:1,Technology:1
                topic 168 (level=3, total_words=4, documents=2): shares (1), overseas (1), adjective (1), considerable (1), encyclopedia (0), egyptian (0), engaged (0), eds (0), education (0), edward (0), efficient (0), engage (0), einstein (0), encounter (0), elder (0), edition (0), emotional (0), emotions (0), emperor (0), emphasizing (0),  == Geography:1,People:1
                topic 170 (level=3, total_words=85, documents=5): registered (2), identifies (2), repair (2), favour (2), environment (2), fungi (2), habitat (1), literacy (1), adverse (1), encouraged (1), initiated (1), substances (1), abundance (1), trials (1), identities (1), categories (1), run (1), animal (1), completely (1), confined (1),  == Everyday_life:1,Health_medicine_and _diesease:1,Science:2,Society_and_social_science:1
                topic 232 (level=3, total_words=97, documents=6): survey (2), raw (2), matrix (2), geography (2), defining (2), trends (2), concrete (2), allowed (2), expect (2), seminal (2), rapidly (1), defend (1), entire (1), refers (1), building (1), slower (1), handling (1), rendered (1), lost (1), protective (1),  == Everyday_life:1,Geography:1,History:1,Science:1,Society_and_social_science:2
        topic 30 (level=1, total_words=14045, documents=80): children (69), cooking (68), theorem (51), rome (43), species (41), renaissance (39), government (36), method (36), energy (35), eventually (34), spread (33), style (31), animals (31), regional (30), traits (29), represented (28), foods (28), quality (28), rate (28), composite (27),  == Arts:4,Everyday_life:5,Geography:8,Health_medicine_and _diesease:1,History:12,Mathematics:4,People:1,Philosophy:8,Science:15,Society_and_social_science:12,Technology:10
            topic 31 (level=2, total_words=3918, documents=49): italy (303), italian (221), personality (82), country (73), food (63), religious (61), percent (38), largest (36), kingdom (28), economic (28), days (27), cells (25), northern (25), city (24), cultural (23), environmental (22), factor (22), france (22), southern (22), relationships (21),  == Arts:2,Everyday_life:2,Geography:5,Health_medicine_and _diesease:1,History:8,Mathematics:3,Philosophy:5,Science:8,Society_and_social_science:8,Technology:7
                topic 32 (level=3, total_words=142, documents=7): education (11), text (6), school (5), adult (4), abuse (4), aspects (3), rates (3), article (3), dynasties (3), young (2), care (2), younger (2), correlated (2), governing (2), seemingly (2), constructions (2), babylonian (2), limit (2), choice (2), ming (2),  == Geography:2,History:2,Philosophy:1,Science:1,Society_and_social_science:1
                topic 34 (level=3, total_words=254, documents=5): religions (31), empire (28), peninsula (24), republic (21), religion (21), cult (16), infection (16), islands (15), union (14), india (13), ordinary (13), founded (13), gdp (13), council (12), league (12), design (12), christian (12), british (12), anti (11), byzantine (11),  == Health_medicine_and _diesease:1,Philosophy:2,Science:2
                topic 79 (level=3, total_words=187, documents=7): plants (149), plant (115), cell (27), organisms (21), land (19), seed (17), carbon (12), classification (11), tissues (10), analysis (10), evolutionary (10), algae (9), seeds (8), flowering (8), shared (7), genes (7), acid (7), morphology (6), systematic (6), root (6),  == History:3,Mathematics:1,Society_and_social_science:2,Technology:1
                topic 98 (level=3, total_words=224, documents=3): positive (12), factors (12), children (11), experiences (7), argued (7), behavior (7), dimensions (6), mind (6), mental (5), defense (5), underlying (4), environment (4), influences (3), relationship (3), subjective (3), accommodate (3), personal (3), structures (3), prime (3), contrary (3),  == Geography:2,Society_and_social_science:1
                topic 122 (level=3, total_words=21, documents=1): coordinate (1), eye (1), breakdown (1), rigid (1), organisms (1), cellular (1), division (1), chemicals (1), fire (1), seeks (1), virtually (1), entering (1), competing (1), media (1), consuming (1), restriction (1), effectively (1), characterised (1), repair (1), collectively (1),  == Science:1
                topic 161 (level=3, total_words=151, documents=7): historically (2), handling (2), originate (2), drama (2), flooding (2), resembles (2), bacterial (2), enjoyed (2), desired (2), controlling (2), filled (2), settlement (2), fields (2), relating (2), writers (2), stops (2), stretched (1), contributes (1), deeper (1), approaching (1),  == Arts:1,Everyday_life:1,History:1,Philosophy:1,Science:1,Society_and_social_science:1,Technology:1
                topic 214 (level=3, total_words=292, documents=10): consistently (3), depth (3), quality (3), custom (3), integration (3), conducting (2), advice (2), matthew (2), diminished (2), arena (2), resolution (2), elevated (2), friendly (2), goal (2), profile (2), sufficient (2), technique (2), win (2), consumer (2), met (2),  == Arts:1,Everyday_life:1,History:1,Philosophy:1,Science:1,Society_and_social_science:2,Technology:3
                topic 261 (level=3, total_words=165, documents=9): rotation (3), ranges (2), automatic (2), linear (2), respect (2), month (2), manipulation (2), altogether (2), shorter (2), smooth (2), uniquely (2), task (2), consisting (2), defining (2), reaching (2), simplest (1), extra (1), dealing (1), column (1), burial (1),  == Geography:1,History:1,Mathematics:2,Science:2,Society_and_social_science:1,Technology:2
            topic 88 (level=2, total_words=2262, documents=31): prime (237), numbers (165), sum (27), function (24), integer (23), division (22), ring (18), proof (16), largest (16), absolute (15), tests (15), evolutionary (13), sequence (12), fundamental (12), square (12), definition (11), distance (11), exists (11), recognized (10), expressed (10),  == Arts:2,Everyday_life:3,Geography:3,History:4,Mathematics:1,People:1,Philosophy:3,Science:7,Society_and_social_science:4,Technology:3
                topic 89 (level=3, total_words=146, documents=4): arithmetic (25), test (19), frac (18), testing (11), ideals (9), problem (9), equal (8), unique (8), hypothesis (7), list (7), mathematicians (7), questions (5), problems (5), hold (5), connected (5), copies (5), expressed (5), correct (4), answer (4), valid (3),  == Geography:1,History:1,Science:2
                topic 91 (level=3, total_words=69, documents=2): species (30), classification (24), organisms (17), biological (8), animals (7), kingdom (6), domain (5), code (4), comprehensive (3), genus (3), data (3), represents (2), identification (2), step (2), family (2), arrangement (2), genetics (2), complete (2), partial (2), variation (2),  == Philosophy:1,Science:1
                topic 128 (level=3, total_words=102, documents=5): understanding (2), binding (2), performs (2), skill (2), activities (1), sort (1), johannes (1), committee (1), displaced (1), media (1), invited (1), mere (1), forming (1), handbook (1), carl (1), complexes (1), post (1), recognizes (1), compared (1), silent (1),  == Everyday_life:1,People:1,Science:2,Society_and_social_science:1
                topic 134 (level=3, total_words=173, documents=8): moves (3), absent (3), dimension (3), deal (3), collected (3), slight (2), assumes (2), felt (2), weakened (2), intention (2), applicable (2), risen (2), formal (2), informally (2), interacting (2), rotating (2), reviewed (2), tens (2), archaeological (2), presents (2),  == Arts:1,History:1,Mathematics:1,Philosophy:2,Science:1,Society_and_social_science:1,Technology:1
                topic 140 (level=3, total_words=115, documents=3): debated (2), incorporate (2), affairs (2), belief (2), sudden (1), constituted (1), intervention (1), talk (1), formulation (1), desired (1), conquered (1), controls (1), experimental (1), solutions (1), recognised (1), credit (1), turkish (1), unable (1), presenting (1), jesus (1),  == History:1,Society_and_social_science:1,Technology:1
                topic 210 (level=3, total_words=102, documents=2): laws (2), hungary (2), club (2), featured (1), spite (1), assigned (1), choices (1), depth (1), strict (1), constructed (1), jones (1), russia (1), sets (1), corner (1), involving (1), secondary (1), undergoing (1), governmental (1), trip (1), composition (1),  == Everyday_life:1,Geography:1
                topic 220 (level=3, total_words=137, documents=7): rough (2), tip (2), hygiene (2), easily (2), suggested (2), identification (2), supported (2), frank (2), watch (2), skills (2), rotation (2), reduce (2), address (2), defensive (2), similarities (2), users (1), motor (1), agent (1), genre (1), documented (1),  == Arts:1,Everyday_life:1,Geography:1,History:1,Science:1,Society_and_social_science:1,Technology:1
        topic 35 (level=1, total_words=31306, documents=144): gold (482), empire (232), bacteria (198), space (194), political (190), medicine (184), animals (142), division (132), russian (114), growth (89), animal (80), program (80), king (78), german (76), earth (70), oxygen (69), religion (68), religious (67), muslim (66), cell (66),  == Arts:7,Everyday_life:4,Geography:15,Health_medicine_and _diesease:3,History:20,Mathematics:10,People:5,Philosophy:7,Science:28,Society_and_social_science:26,Technology:19
            topic 36 (level=2, total_words=4735, documents=40): coal (336), energy (271), union (182), trade (158), renewable (131), japanese (102), computers (89), workers (86), displaystyle (80), japan (78), fruits (69), largest (67), launch (65), program (60), spacecraft (54), indian (53), global (46), government (45), capacity (43), technologies (42),  == Arts:4,Everyday_life:3,Geography:3,Health_medicine_and _diesease:2,History:4,Mathematics:2,People:2,Science:10,Society_and_social_science:5,Technology:5
                topic 126 (level=3, total_words=177, documents=6): improved (4), bases (3), persisted (2), switzerland (2), responsibility (2), invaded (2), sovereign (2), terminology (2), owners (2), road (2), retained (2), roger (2), option (2), secure (2), demands (2), essentially (2), efficiency (2), railroad (2), run (2), involving (2),  == History:2,Science:2,Technology:2
                topic 133 (level=3, total_words=107, documents=4): frequently (2), distant (2), occurring (2), professional (2), danish (2), defensive (1), alliances (1), directed (1), sound (1), deeper (1), heard (1), denote (1), restore (1), capital (1), generic (1), preparation (1), preceding (1), ruling (1), preceded (1), differently (1),  == Arts:1,People:1,Science:2
                topic 150 (level=3, total_words=176, documents=7): recovery (3), stocks (2), failure (2), hall (2), subset (2), pairs (2), carried (2), pole (2), finally (2), viable (2), britain (2), map (2), consequences (2), accident (2), handed (2), egyptians (2), processed (2), preceded (2), markets (1), headed (1),  == Everyday_life:1,Mathematics:1,People:1,Science:2,Society_and_social_science:1,Technology:1
                topic 174 (level=3, total_words=73, documents=2): calculation (2), laid (2), straight (2), versa (2), optimal (1), nova (1), elementary (1), stronger (1), spectrum (1), applications (1), sciences (1), rigorous (1), parallel (1), undergo (1), conjunction (1), deliberately (1), rare (1), defines (1), calculate (1), medium (1),  == Mathematics:1,Science:1
                topic 230 (level=3, total_words=98, documents=6): synonym (3), recording (3), response (2), enabling (2), publishers (2), sort (2), shaped (2), paper (2), finance (2), pioneering (1), wrote (1), fusion (1), positions (1), accessible (1), run (1), vice (1), conducting (1), perception (1), creator (1), thinking (1),  == Arts:1,Everyday_life:1,Geography:2,Society_and_social_science:2
                topic 231 (level=3, total_words=5, documents=1): families (1), pronunciation (1), denote (1), organised (1), centre (1), einstein (0), edition (0), eds (0), education (0), edward (0), efficient (0), egyptian (0), elevated (0), elder (0), ear (0), emotional (0), emotions (0), emperor (0), emphasizing (0), encounter (0),  == Society_and_social_science:1
                topic 241 (level=3, total_words=262, documents=12): factor (5), exceeded (4), indirectly (3), controlling (3), dramatically (3), prolonged (2), costly (2), indicator (2), dollars (2), scales (2), needed (2), micro (2), meeting (2), integrity (2), prohibition (2), aged (2), adaptation (2), facilities (2), phrase (2), office (2),  == Arts:1,Everyday_life:1,Geography:1,Health_medicine_and _diesease:2,History:2,Science:3,Technology:2
                topic 243 (level=3, total_words=35, documents=1): sense (1), eventually (1), province (1), collective (1), geographic (1), condition (1), officer (1), invaders (1), ubiquitous (1), susceptible (1), respective (1), remnants (1), successive (1), dynasties (1), running (1), passes (1), constitutes (1), europeans (1), globe (1), moon (1),  == Arts:1
                topic 259 (level=3, total_words=41, documents=1): assumption (1), chosen (1), northwestern (1), autonomy (1), organizations (1), seek (1), incorporated (1), outline (1), cutting (1), implement (1), identify (1), planet (1), regulating (1), steven (1), considers (1), revised (1), populations (1), peer (1), communities (1), breakdown (1),  == Society_and_social_science:1
            topic 45 (level=2, total_words=2413, documents=33): tanks (162), sport (63), women (40), vehicles (38), protection (32), army (32), surgery (31), battle (30), species (30), hospitals (25), organization (24), goods (21), rules (20), court (19), machine (19), intent (18), britain (18), members (18), forces (18), air (16),  == Geography:4,History:2,Mathematics:6,People:1,Science:5,Society_and_social_science:10,Technology:5
                topic 46 (level=3, total_words=228, documents=3): trade (99), sports (69), agreement (34), mobility (29), british (25), anti (24), design (24), agreements (23), combat (23), fire (21), crime (17), engine (17), negotiations (15), council (15), terrain (15), commander (14), working (14), built (13), target (12), economic (12),  == History:1,Mathematics:1,Technology:1
                topic 66 (level=3, total_words=191, documents=7): medical (119), disease (37), chinese (26), search (16), anatomy (14), bce (11), blood (11), illness (11), ages (10), techniques (10), dynasty (8), advanced (8), online (8), improved (8), drugs (8), services (7), poor (7), eds (6), soldiers (6), treatments (6),  == History:1,People:1,Science:1,Society_and_social_science:4
                topic 113 (level=3, total_words=94, documents=5): publications (2), feudal (2), ready (2), lost (2), norman (2), burn (1), movable (1), mapping (1), exhibition (1), intact (1), estimated (1), manufacturers (1), educational (1), contracts (1), legitimate (1), cutting (1), noble (1), achievement (1), ranking (1), satisfy (1),  == Mathematics:1,Society_and_social_science:2,Technology:2
                topic 215 (level=3, total_words=206, documents=8): logical (3), registered (3), seeks (2), approval (2), unusually (2), mirror (2), reserved (2), audience (2), analyzing (2), completely (2), adds (2), straight (2), formulas (2), micro (2), flowers (2), serves (2), connects (2), managing (2), raw (2), fast (2),  == Geography:3,Mathematics:2,Science:1,Society_and_social_science:1,Technology:1
                topic 216 (level=3, total_words=72, documents=3): broader (2), extensively (2), alternate (2), periodic (2), solids (2), cubic (2), measure (1), scheme (1), selective (1), fund (1), landed (1), employs (1), scarce (1), curved (1), translation (1), predicted (1), poles (1), smooth (1), autonomy (1), variables (1),  == Mathematics:1,Science:1,Society_and_social_science:1
                topic 254 (level=3, total_words=103, documents=6): white (2), removing (2), ordinary (2), evidenced (2), warning (2), intense (2), enters (2), deities (2), locations (2), founder (1), reactive (1), sounds (1), province (1), grain (1), shadow (1), urban (1), presenting (1), progressively (1), shortage (1), intensity (1),  == Geography:1,Mathematics:1,Science:2,Society_and_social_science:2
                topic 263 (level=3, total_words=22, documents=1): animal (1), terrain (1), oxford (1), faced (1), suicide (1), actions (1), spending (1), analyses (1), simplest (1), reinforced (1), advantage (1), applicable (1), homes (1), combinations (1), spanning (1), brought (1), months (1), monitor (1), students (1), contributes (1),  == Technology:1
            topic 72 (level=2, total_words=2453, documents=36): tools (85), displaystyle (23), model (22), transfer (22), structures (21), ion (21), solution (17), wall (16), media (16), element (15), negative (14), genetic (13), replaced (13), rational (12), surfaces (12), salt (10), factors (10), forming (10), carbon (10), formation (9),  == Arts:1,Everyday_life:1,Geography:4,Health_medicine_and _diesease:1,History:7,Philosophy:4,Science:8,Society_and_social_science:6,Technology:4
                topic 73 (level=3, total_words=27, documents=1): numbers (29), operation (8), inverse (7), usual (2), placing (1), identity (1), denotes (1), dangerous (1), rely (1), combined (1), scattered (1), elementary (1), bulgaria (1), descended (1), imports (1), controlling (1), arrangement (1), enemy (1), weather (1), property (1),  == History:1
                topic 75 (level=3, total_words=96, documents=3): base (84), bacterial (58), tool (32), definition (24), nutrients (14), positive (12), classification (10), species (10), multi (9), purpose (9), oxygen (8), solutions (8), surface (8), molecular (7), identify (6), occur (6), formula (6), humans (5), generate (5), items (5),  == Science:1,Society_and_social_science:2
                topic 115 (level=3, total_words=149, documents=3): georg (2), belong (2), situation (2), continuum (2), summary (2), faith (2), sufficient (2), oxford (2), depicted (2), stimulated (2), offers (2), philosophies (2), heart (2), unrelated (2), centre (1), excluded (1), symbolism (1), degree (1), reproductive (1), component (1),  == Philosophy:2,Society_and_social_science:1
                topic 142 (level=3, total_words=32, documents=2): connections (1), accumulate (1), breathing (1), adult (1), sending (1), collect (1), structured (1), gray (1), tissue (1), toll (1), fat (1), impacts (1), season (1), choices (1), chief (1), inherently (1), combined (1), labor (1), pump (1), crops (1),  == Science:1,Technology:1
                topic 193 (level=3, total_words=78, documents=3): proto (2), attracting (2), captured (2), shift (2), faces (2), desirable (2), sample (1), enlarged (1), resembling (1), celestial (1), young (1), obsolete (1), coordinated (1), streets (1), sons (1), cuts (1), suitable (1), handling (1), unique (1), unstable (1),  == Arts:1,Geography:1,Science:1
                topic 235 (level=3, total_words=144, documents=8): metal (2), accounted (2), employed (2), machines (2), analyzing (2), offering (2), strategy (2), master (2), evolutionary (2), sea (1), regulate (1), divide (1), machinery (1), roughly (1), ireland (1), mixing (1), capture (1), drink (1), documented (1), spring (1),  == History:3,Philosophy:1,Science:2,Technology:2
                topic 237 (level=3, total_words=123, documents=7): lighter (3), immune (2), epic (2), belief (2), efficient (2), affairs (2), cash (2), commodity (2), decade (2), yellow (2), arranged (2), interpretations (1), magic (1), seemingly (1), proportional (1), running (1), behavioral (1), roughly (1), clouds (1), monasteries (1),  == Everyday_life:1,Health_medicine_and _diesease:1,History:2,Science:2,Society_and_social_science:1
                topic 262 (level=3, total_words=113, documents=4): search (2), empty (2), considers (2), shaping (2), perceive (2), participating (2), resolution (2), altered (2), variation (1), fed (1), christianity (1), worse (1), examining (1), zones (1), ruler (1), slowly (1), exercise (1), predict (1), landscapes (1), children (1),  == Geography:1,Philosophy:1,Society_and_social_science:1,Technology:1
                topic 276 (level=3, total_words=120, documents=5): younger (3), threatening (2), twin (2), seek (2), hold (2), print (2), face (2), ancestral (2), front (2), declining (2), heritage (2), permitted (2), sale (2), popularly (2), throne (2), operate (1), enlarged (1), legitimate (1), exposed (1), principally (1),  == Geography:2,History:1,Science:1,Society_and_social_science:1
            topic 83 (level=2, total_words=1779, documents=35): cell (53), cells (45), plants (18), tree (16), organisms (12), evolution (11), lack (11), simple (10), fungi (9), changed (8), root (8), environment (8), takes (7), upper (7), list (7), version (7), features (7), combination (7), david (7), partially (7),  == Arts:2,Geography:4,History:7,Mathematics:2,People:2,Philosophy:3,Science:5,Society_and_social_science:5,Technology:5
                topic 84 (level=3, total_words=189, documents=4): membrane (21), bacteria (16), nucleus (14), structures (13), wall (11), dna (10), ancestor (7), acquired (6), proposes (5), bacterial (4), plant (4), structural (4), lost (4), classification (3), reproduction (3), delta (3), sister (3), composed (3), reduced (3), volume (3),  == Geography:2,History:1,Science:1
                topic 105 (level=3, total_words=73, documents=4): periodic (2), henry (2), martin (2), exhibits (2), sun (2), carrier (1), worlds (1), uniform (1), rejection (1), ambiguous (1), neighbors (1), color (1), victory (1), waves (1), unesco (1), articles (1), cook (1), question (1), massachusetts (1), writes (1),  == People:1,Science:2,Society_and_social_science:1
                topic 114 (level=3, total_words=87, documents=4): linked (2), archaeologists (2), difficulty (2), korea (2), markers (2), distinguishing (2), regulatory (1), confusion (1), designs (1), steps (1), pyramid (1), males (1), companion (1), significance (1), lineage (1), success (1), contributes (1), officers (1), assigned (1), fertile (1),  == Geography:1,History:2,Science:1
                topic 118 (level=3, total_words=143, documents=6): occupation (3), enjoyed (3), playing (2), class (2), revolutions (2), marks (2), rival (2), manner (2), persisted (2), attempts (2), nicholas (2), uncommon (2), tone (2), fair (2), foreigners (2), nearby (2), preferred (1), obtaining (1), village (1), herbert (1),  == Arts:1,History:2,Society_and_social_science:1,Technology:2
                topic 154 (level=3, total_words=106, documents=4): manuscripts (2), quality (2), spelling (2), sides (2), drawing (2), numerous (1), rough (1), marks (1), carries (1), quantity (1), attack (1), ordered (1), examine (1), conceived (1), classified (1), mexico (1), alexandria (1), bought (1), bringing (1), call (1),  == Mathematics:1,Philosophy:1,Society_and_social_science:1,Technology:1
                topic 163 (level=3, total_words=147, documents=8): rejected (3), relates (2), provisions (2), transactions (2), domination (2), reviewed (2), seeks (2), domain (2), shift (2), interested (2), intent (2), facto (2), funded (2), involve (2), add (2), obligations (1), contracts (1), analyze (1), capitalism (1), blue (1),  == Arts:1,Geography:1,History:1,Philosophy:2,Society_and_social_science:2,Technology:1
                topic 183 (level=3, total_words=59, documents=5): genesis (1), architect (1), village (1), argument (1), genome (1), indigenous (1), losing (1), honor (1), reserved (1), james (1), interpreted (1), independently (1), caucasus (1), return (1), axes (1), notation (1), government (1), conventions (1), palaces (1), attacked (1),  == History:1,Mathematics:1,People:1,Science:1,Technology:1
        topic 50 (level=1, total_words=9327, documents=52): victoria (73), mountains (56), mountain (46), nile (44), england (43), kingdom (35), city (34), norway (33), defensive (31), fish (31), northern (28), earth (25), metres (24), materials (19), tend (19), percent (19), oldest (19), conquest (19), clear (17), elevation (17),  == Arts:1,Everyday_life:5,Geography:8,Health_medicine_and _diesease:1,History:2,Mathematics:3,People:2,Philosophy:5,Science:10,Society_and_social_science:9,Technology:6
            topic 51 (level=2, total_words=2129, documents=28): species (35), african (13), air (10), traditionally (10), environmental (8), spread (8), snow (8), temperature (8), consists (8), comparison (7), moving (7), volume (7), depth (7), erosion (7), base (7), benefit (7), changed (7), theoretical (7), describing (6), sacred (6),  == Arts:1,Everyday_life:3,Geography:5,History:1,Mathematics:2,Philosophy:4,Science:2,Society_and_social_science:6,Technology:4
                topic 52 (level=3, total_words=122, documents=5): metres (7), falls (6), kilometres (6), africa (6), plant (4), notably (3), regarded (3), expedition (3), loss (3), plants (3), threatened (3), spread (3), systematic (2), silver (2), eating (2), scientists (2), inherently (2), evil (2), officials (2), issue (2),  == Everyday_life:1,Philosophy:1,Society_and_social_science:3
                topic 53 (level=3, total_words=221, documents=6): highest (13), sea (10), rock (9), definition (7), ground (7), heat (6), surrounding (5), animals (4), occur (4), agriculture (4), article (3), separation (3), names (3), climates (3), deriving (2), moment (2), isaac (2), meant (2), lie (2), apparently (2),  == Geography:2,Philosophy:2,Science:1,Society_and_social_science:1
                topic 139 (level=3, total_words=139, documents=3): released (2), collection (2), moved (1), discussion (1), sake (1), square (1), donald (1), participation (1), permitted (1), disputes (1), calendar (1), dissolution (1), breakdown (1), model (1), unclear (1), path (1), minority (1), prepared (1), gradual (1), norman (1),  == Mathematics:1,Philosophy:1,Technology:1
                topic 172 (level=3, total_words=160, documents=6): discussed (3), eventual (2), race (2), exploitation (2), prolonged (2), charge (2), voting (2), scientist (2), topics (2), journals (2), characterized (2), fishing (2), politicians (2), span (2), grows (2), article (1), mind (1), advertising (1), officials (1), modes (1),  == Everyday_life:2,Geography:1,Science:1,Society_and_social_science:1,Technology:1
                topic 200 (level=3, total_words=135, documents=5): senate (3), profit (3), socially (2), net (2), opinions (2), governments (2), percentage (2), presented (2), faster (2), sustain (2), advancement (2), start (2), tons (2), explored (1), democratic (1), write (1), failures (1), estimate (1), violence (1), consume (1),  == Geography:2,History:1,Society_and_social_science:1,Technology:1
                topic 250 (level=3, total_words=61, documents=3): reduce (1), turkey (1), districts (1), vegetable (1), machinery (1), portion (1), practised (1), represented (1), destroyed (1), jet (1), harmony (1), makers (1), consumers (1), defines (1), philip (1), sales (1), stretching (1), significance (1), ideal (1), guide (1),  == Arts:1,Mathematics:1,Technology:1
            topic 70 (level=2, total_words=2588, documents=24): coast (20), sea (17), settled (16), roman (15), isbn (15), medieval (15), names (13), permanent (13), city (12), norwegian (12), force (11), valley (11), date (11), lost (9), draw (9), attempted (9), style (9), vulnerable (8), amount (8), construction (8),  == Everyday_life:2,Geography:3,Health_medicine_and _diesease:1,History:1,Mathematics:1,People:2,Philosophy:1,Science:8,Society_and_social_science:3,Technology:2
                topic 125 (level=3, total_words=30, documents=2): event (2), extensive (1), correctly (1), romans (1), constituents (1), generates (1), feature (1), accumulated (1), discovery (1), circle (1), scientists (1), babylonian (1), ultra (1), quasi (1), absent (1), physiology (1), finding (1), preceding (1), weaker (1), witnessed (1),  == Science:2
                topic 213 (level=3, total_words=97, documents=4): controls (2), emotions (2), molecule (2), altered (2), broken (2), tasks (1), testing (1), metal (1), stability (1), applicable (1), consist (1), mathematicians (1), exile (1), test (1), transferred (1), grade (1), adverse (1), observed (1), advocated (1), shape (1),  == Everyday_life:1,Health_medicine_and _diesease:1,History:1,Science:1
                topic 221 (level=3, total_words=125, documents=4): nations (3), ordinary (2), differential (2), mouth (2), desirable (2), leaders (2), improvement (2), prominence (2), computer (1), institution (1), wrong (1), protecting (1), denoted (1), die (1), excluded (1), relevance (1), preparing (1), speculation (1), indicator (1), linked (1),  == Mathematics:1,People:1,Science:1,Society_and_social_science:1
                topic 242 (level=3, total_words=89, documents=4): hour (2), glass (2), synonym (2), decay (2), jurisdictions (2), subsistence (1), stanley (1), jet (1), demand (1), distances (1), electrons (1), percent (1), adults (1), adult (1), authorities (1), performed (1), fled (1), gaining (1), tenth (1), rising (1),  == Everyday_life:1,Geography:2,Science:1
                topic 258 (level=3, total_words=59, documents=2): wikimedia (2), underwent (2), popularity (2), philosopher (1), teach (1), landed (1), modernity (1), literary (1), carefully (1), buddhism (1), deal (1), classes (1), jack (1), indus (1), construction (1), warriors (1), seemingly (1), web (1), fast (1), isolation (1),  == Geography:1,Philosophy:1
                topic 267 (level=3, total_words=109, documents=3): characteristic (3), actual (2), modes (2), assessment (2), celestial (1), drink (1), responsible (1), restriction (1), queen (1), offers (1), explaining (1), rough (1), defining (1), james (1), ancestry (1), promotes (1), translations (1), zone (1), indirect (1), representatives (1),  == People:1,Science:2
                topic 286 (level=3, total_words=133, documents=5): switched (2), dominance (2), attested (2), compounds (2), manufacturers (2), tests (2), exact (2), horizontal (2), nineteenth (2), harvard (1), continuing (1), option (1), scholarly (1), manuscripts (1), overwhelming (1), king (1), climates (1), fires (1), conventional (1), italian (1),  == Science:1,Society_and_social_science:2,Technology:2
        topic 57 (level=1, total_words=11334, documents=62): capitalism (185), hygiene (138), economic (110), capitalist (97), demand (92), properties (60), diplomatic (55), accumulation (52), metals (52), economy (50), relationship (48), chemical (47), money (46), profit (45), class (43), health (43), food (42), spread (41), numbers (38), labour (38),  == Arts:3,Everyday_life:5,Geography:5,Health_medicine_and _diesease:3,History:5,Mathematics:3,Philosophy:6,Science:16,Society_and_social_science:15,Technology:1
            topic 58 (level=2, total_words=2755, documents=29): atomic (54), personal (45), sets (44), performed (41), weeks (40), foreign (40), induced (37), expression (34), electrons (30), legal (27), behavior (23), islamic (20), spain (20), women (20), health (19), indigenous (19), france (18), actions (18), medieval (16), configuration (16),  == Arts:2,Geography:2,Health_medicine_and _diesease:2,History:2,Mathematics:1,Philosophy:3,Science:6,Society_and_social_science:10,Technology:1
                topic 59 (level=3, total_words=74, documents=4): practices (34), disease (21), hands (19), risk (17), safe (10), sanitation (9), foods (9), reduce (8), domestic (7), risks (7), transmission (7), proper (7), strains (6), quality (6), church (6), drinking (6), products (5), access (5), procedures (5), respiratory (5),  == Philosophy:1,Society_and_social_science:3
                topic 62 (level=3, total_words=44, documents=2): women (41), god (32), spanish (25), woman (23), birth (18), rate (16), access (13), spontaneous (11), procedure (11), feel (10), sex (10), procedures (10), perceived (10), anti (9), treatment (9), worldwide (9), british (9), german (8), skills (8), eastern (8),  == Health_medicine_and _diesease:1,History:1
                topic 87 (level=3, total_words=115, documents=4): periodic (88), electron (64), transition (27), person (18), metal (16), dynasty (15), shell (15), authority (15), empire (15), relationships (14), relations (13), peace (13), tend (12), individuals (11), host (10), weight (9), leads (9), radius (8), naturally (8), positive (8),  == Arts:1,Mathematics:1,Science:1,Society_and_social_science:1
                topic 148 (level=3, total_words=232, documents=5): peoples (3), severely (3), attempted (3), attested (2), martial (2), acquired (2), argue (2), feudal (2), choose (2), canada (2), section (2), concern (2), sovereignty (2), journal (2), morality (2), recorded (2), articles (2), extraordinary (2), judgment (2), lists (2),  == History:1,Philosophy:1,Science:1,Society_and_social_science:2
                topic 199 (level=3, total_words=205, documents=6): succeeded (4), context (3), commander (3), lee (3), box (2), nominal (2), operates (2), hosts (2), activists (2), unity (2), acknowledged (2), coherent (2), implementing (2), appearance (2), distant (2), artist (2), contributes (2), oceania (2), implement (2), plays (2),  == Arts:1,Geography:2,Philosophy:1,Society_and_social_science:1,Technology:1
                topic 278 (level=3, total_words=143, documents=4): compounds (3), variation (3), details (2), points (2), sequence (2), criteria (2), plans (2), citizens (1), actively (1), altogether (1), background (1), astronomer (1), delivered (1), occasionally (1), functioning (1), sole (1), asked (1), audio (1), strategies (1), healthcare (1),  == Health_medicine_and _diesease:1,Science:2,Society_and_social_science:1
                topic 283 (level=3, total_words=98, documents=4): companion (3), leather (2), impact (2), extreme (2), tonnes (1), tons (1), investigate (1), offset (1), indirect (1), breeding (1), granted (1), worse (1), super (1), expected (1), efficiently (1), reflecting (1), obtaining (1), rotating (1), emerged (1), combine (1),  == Science:2,Society_and_social_science:2
            topic 92 (level=2, total_words=2898, documents=33): market (108), labor (57), growth (39), political (35), product (24), government (24), resources (23), income (20), worker (16), laws (14), existed (14), volume (14), formation (14), individuals (14), david (14), amount (14), constant (13), simple (13), commodities (13), cost (13),  == Arts:1,Everyday_life:5,Geography:3,Health_medicine_and _diesease:1,History:3,Mathematics:2,Philosophy:3,Science:10,Society_and_social_science:5
                topic 93 (level=3, total_words=77, documents=2): price (62), model (28), equilibrium (27), slavery (25), private (25), surplus (24), ownership (18), argued (17), business (14), services (13), economists (13), argue (12), commodity (11), consumption (11), industry (10), rights (10), profits (9), mixed (9), economist (9), reproduction (8),  == Science:2
                topic 124 (level=3, total_words=42, documents=2): physiology (2), arrive (2), drawn (1), handling (1), choosing (1), protein (1), insight (1), cycles (1), warmer (1), scarce (1), apparently (1), continue (1), famously (1), observed (1), returns (1), threat (1), rainfall (1), transit (1), appearance (1), continuously (1),  == Science:2
                topic 160 (level=3, total_words=95, documents=5): stressed (2), debate (2), deal (2), characterized (2), positions (2), distinguished (2), replaced (2), correspondence (2), dominated (2), literally (1), subset (1), codified (1), dealt (1), differed (1), unions (1), geography (1), georg (1), showing (1), distinguish (1), sake (1),  == Arts:1,Mathematics:1,Philosophy:1,Society_and_social_science:2
                topic 201 (level=3, total_words=269, documents=7): involving (4), enter (3), report (3), introducing (3), evaluation (3), oral (3), deliver (2), restriction (2), easy (2), distinguishes (2), secret (2), continuum (2), title (2), affect (2), honor (2), severely (2), suppress (2), serve (2), amounts (2), training (2),  == Everyday_life:2,Geography:1,Health_medicine_and _diesease:1,Mathematics:1,Philosophy:1,Society_and_social_science:1
                topic 205 (level=3, total_words=115, documents=4): cold (2), declared (2), composition (2), businesses (2), quick (2), journey (2), find (2), bought (1), company (1), execution (1), illness (1), makers (1), coordination (1), horn (1), capacities (1), reforms (1), invaders (1), stood (1), encourage (1), severely (1),  == Everyday_life:2,History:1,Science:1
                topic 212 (level=3, total_words=168, documents=7): depending (3), internal (3), feminist (3), facilitated (2), examined (2), regimes (2), alive (2), newer (2), alternatively (2), practically (2), expelled (2), timing (2), advocated (2), stress (2), overthrow (2), demonstrate (2), contained (2), intense (2), hypotheses (2), recognizes (2),  == History:2,Science:3,Society_and_social_science:2
                topic 260 (level=3, total_words=147, documents=6): arm (3), huge (3), tip (2), enacted (2), carl (2), traces (2), camps (2), october (2), germanic (2), interpreted (2), unity (2), complete (2), exercises (2), entity (1), death (1), constraints (1), theoretical (1), lasting (1), columns (1), habitat (1),  == Everyday_life:1,Geography:2,Philosophy:1,Science:2