assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0081252 IAO:0000115 A suptratentorial ependymoma that is characterized by the presence of a fusion gene involving ZFTA gene. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/33879448/""}]}"