assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:1970 IAO:0000115 A fallopian tube cancer that is characterized as a mixture of carcinoma and sarcoma and has_material_basis_in epithelial tissue and has_material_basis_in connective tissue. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Carcinosarcoma""}]}"