assertion  retraction  graph  subject       predicate    object                                                                                                    datatype    annotation
1          0           graph  DOID:0080639  IAO:0000115  A bone cancer that has_material_basis_in abnormally proliferating cells derives from embryonic mesoderm.  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/PMC5805807""}]}"