assertion  retraction  graph  subject       predicate    object                                                                                                                                         datatype    annotation
1          0           graph  DOID:0050929  IAO:0000115  A melanoma that has_material_basis_in melanocytes located_in mucosal membranes lining the respiratory, gastrointestinal and urogenital tract.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3466987/?report=classic""}]}"