assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:4440 IAO:0000115 A germinoma that has_material_basis_in cells that make sperm and eggs. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007637""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007641""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.gov/dictionary?CdrID=46577""}]}"