assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:6083 IAO:0000115 An ovarian endodermal sinus tumor that presents in childhood. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/8649322""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/9949591""}]}"