assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5482 IAO:0000115 An ovarian benign neoplasm that is composed_of epithelial ovarian tissue. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.ajronline.org/cgi/content/full/182/5/1259""}]}"