assertion  retraction  graph  subject    predicate    object                                                                                  datatype    annotation
1          0           graph  DOID:4504  IAO:0000115  A central nervous system sarcoma that is located_in the inner lining of blood vessels.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://thejns.org/doi/abs/10.3171/jns.1991.75.1.0073""}]}"