assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5124 IAO:0000115 A fallopian tube benign neoplasm that has_material_basis_in smooth muscle cells. 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/pmc/articles/PMC5137476/""}]}"