diff --git a/plant-ontology.obo b/plant-ontology.obo
index a6c9f90..d9e920c 100644
--- a/plant-ontology.obo
+++ b/plant-ontology.obo
@@ -25,7 +25,6 @@ treat-xrefs-as-is_a: CARO
 import: http://purl.obolibrary.org/obo/po/imports/ncbitaxon_import.owl
 import: http://purl.obolibrary.org/obo/po/imports/ro_import.owl
 ontology: po
-owl-axioms: Prefix(owl:=<http://www.w3.org/2002/07/owl#>)\nPrefix(rdf:=<http://www.w3.org/1999/02/22-rdf-syntax-ns#>)\nPrefix(xml:=<http://www.w3.org/XML/1998/namespace>)\nPrefix(xsd:=<http://www.w3.org/2001/XMLSchema#>)\nPrefix(rdfs:=<http://www.w3.org/2000/01/rdf-schema#>)\n\n\nOntology(\n\n\nAnnotationAssertion(rdfs:comment <http://purl.obolibrary.org/obo/PO_0000020> \"\")\n)
 
 [Term]
 id: PO:0000001