assertion  retraction  graph  subject       predicate    object                                                                                                                                                                                                                                                    datatype    annotation
1          0           graph  DOID:0060106  IAO:0000115  A brain cancer that is characterized by tumor of the meninges, that develops from the membranes that surround the brain and spinal cord, has_material_basis_in abnormally proliferating cells derives_from meningeal cells of embryonic ectoderm origin.  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/Meningioma""}]}"