diff --git a/data.lisp b/data.lisp
index 97e34b6..c64325f 100644
--- a/data.lisp
+++ b/data.lisp
@@ -60,10 +60,16 @@
 	    :accessor sentence-mtokens)))
 
 
+(defmethod print-object ((obj sentence) out)
+  (print-unreadable-object (obj out :type t)
+    (format out "~a at ~a"
+	    (sentence-meta-value obj "sent_id") 
+	    (slot-value obj 'start))))
+
 (defmethod print-object ((obj token) out)
   (print-unreadable-object (obj out :type t)
-    (format out "~a #~a-~a-~a"
-	    (slot-value obj 'form) ; (slot-value obj 'upostag)
+    (format out "~a/~a #~a-~a-~a"
+	    (slot-value obj 'form) (slot-value obj 'upostag)
 	    (slot-value obj 'id) (slot-value obj 'deprel) (slot-value obj 'head))))
 
 
diff --git a/experimental.lisp b/experimental.lisp
index 239300d..a9801ce 100644
--- a/experimental.lisp
+++ b/experimental.lisp
@@ -31,17 +31,17 @@
 ;;; getting substrings a the sentence (flat, compounds etc)
 
 (defun linearize (sentence token &key (filter nil) (direction :both))
-  (let ((childs (token-childs token sentence :fn-filter filter))
+  (let ((children (token-children token sentence :fn-filter filter))
 	pre pos)
-    (dolist (c childs)
+    (dolist (c children)
       (if (< (token-id c) (token-id token))
 	  (push c pre)
 	  (push c pos)))
     (let ((lhs (mappend (lambda (tk)
-			  (linerialize sentence tk filter :direction :both))
+			  (linearize sentence tk :filter filter :direction :both))
 			(reverse pre)))
 	  (rhs (mappend (lambda (tk)
-			  (linerialize sentence tk filter :direction :both))
+			  (linearize sentence tk :filter filter :direction :both))
 			(reverse pos))))
       (case direction
 	(:both  (append lhs (list token) rhs))
@@ -57,7 +57,7 @@
 		 (if (member (token-deprel (car alist)) deps :test #'equal)
 		     (aux (cdr alist))
 		     alist))))
-    (aux a-list-tokens)))
+    (reverse (aux (reverse (aux a-list-tokens))))))
 
 
 (defun get-groups (deprel sent &optional (out *standard-output*))
@@ -67,11 +67,20 @@
 	    (format out "~{~a~^ ~}~%" (mapcar #'token-form alist)))
 	  (remove-duplicates (mapcar (lambda (tk)
 				       (list-trim '("case" "advmod" "punct" "cc" "det")
-						  (linerialize sent (token-parent tk sent) nil)))
+						  (linearize sent (token-parent tk sent))))
 				     leaves) :test #'equal))))
 
-;; Execute (get-groups "compound" a-sentence)
+(defun get-groups (deprel sent)
+  (let ((leaves (remove-if-not (lambda (tk) (equal deprel (token-deprel tk)))
+			       (sentence-tokens sent))))
+    (mapcar (lambda (alist)
+	      (format nil "~{~a~^ ~}" (mapcar #'token-form alist)))
+	    (remove-duplicates (mapcar (lambda (tk)
+					 (list-trim '("case" "advmod" "punct" "cc" "det")
+						    (linearize sent (token-parent tk sent))))
+				       leaves) :test #'equal))))
 
+;; Execute (get-groups "compound" a-sentence)
 
 ;;; problems in the misc field
 
diff --git a/packages.lisp b/packages.lisp
index e3bd218..0074246 100644
--- a/packages.lisp
+++ b/packages.lisp
@@ -31,8 +31,9 @@
 	   #:write-conllu-to-stream   
 	   #:levenshtein
 	   #:diff
-	   #:insert-token
-	   #:remove-token
+	   #:sentence-binary-tree
+	   ; #:insert-token
+	   ; #:remove-token
 	   #:adjust-sentence
 	   #:non-projective?
 
diff --git a/rules.lisp b/rules.lisp
index 9289a3a..f42de66 100644
--- a/rules.lisp
+++ b/rules.lisp
@@ -35,11 +35,9 @@
 
 ;;acessores e leitor de regras
 
-
 (defun rls (rule)
   (cadr rule))
 
-
 (defun rhs (rule)
   (caddr rule))
 
@@ -106,12 +104,12 @@
 				       (caddr condition))))
        pattern)))
 
-;; 
-
 
 (defun apply-rules (sentences rules recursive)
   (dolist (sentence sentences)
-    (apply-rules-in-sentence sentence rules (cdr (assoc "sent_id" (sentence-meta sentence) :test #'equalp)) recursive)))
+    (apply-rules-in-sentence sentence rules
+			     (cdr (assoc "sent_id" (sentence-meta sentence) :test #'equalp))
+			     recursive)))
 
 
 (defun apply-rules-in-sentence (a-sentence rules sent-id  recursive &optional old-rules-applied)