assertion  retraction  graph  subject    predicate    object                                                                              datatype    annotation
1          0           graph  DOID:1752  IAO:0000115  An ocular cancer that has_material_basis_in melanocytes and is located_in the eye.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007637""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007641""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.gov/dictionary?CdrID=269467""}]}"