assertion  retraction  graph  subject    predicate    object                                                                                                                                                                                                                        datatype    annotation
1          0           graph  DOID:7750  IAO:0000115  A brain ependymoma that is characterized by tumor in the ependyma of adults located_in spine, located_in intracranial (4th ventricle) and has_material_basis_in abnormally proliferating cells derives_from ependymal cells.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://en.wikipedia.org/wiki/Ependyma""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://en.wikipedia.org/wiki/Ependymoma""}]}"