assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0080892 IAO:0000115 A supratentorial ependymoma that has_material_basis_in presence of a RELA fusion gene. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.pathologyoutlines.com/topic/cnstumorependymomarelafusion.html""}]}"