assertion  retraction  graph  subject    predicate    object                                                                                                                                                                                               datatype    annotation
1          0           graph  DOID:4955  IAO:0000115  A central nervous system cancer that is characterized by melanocytic neoplasm that develops from melanocytes, has_material_basis_in abnormally proliferating cells derives_from neural crest cells.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4209706/""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/10403296""}]}"