assertion  retraction  graph  subject    predicate    object                                                                                                      datatype    annotation
1          0           graph  DOID:2129  IAO:0000115  A brain cancer that is usually located in the brain, but can occur anywhere in the central nervous system.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Atypical_teratoid_rhabdoid_tumor""}]}"