assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:3071 IAO:0000115 A gliomablastoma that is characterized by a biphasic tissue pattern with alternating areas displaying glial and mesenchymal differentiation. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://en.wikipedia.org/wiki/Gliosarcoma""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.cancer.gov/rare-brain-spine-tumor/tumors/gliosarcoma""}]}"