assertion  retraction  graph  subject   predicate    object                                                                 datatype    annotation
1          0           graph  DOID:734  IAO:0000115  An urinary tract cancer that derives_from the tissues of the urethra.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007637""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.gov/cancertopics/pdq/treatment/urethral/Patient""}]}"