assertion  retraction  graph  subject    predicate    object                                                                                                                                                                                                                                       datatype    annotation
1          0           graph  DOID:6501  IAO:0000115  A brain stem cancer that is characterized by slow growing, highly vascular tumors that develops from the vascular system, has_material_basis_in abnormally proliferating cells derives_from endothelial cells, pericytes and stromal cells.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://en.wikipedia.org/wiki/Hemangioblastoma""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/19787293""}]}"