assertion  retraction  graph  subject   predicate    object                                                                                                                    datatype    annotation
1          0           graph  DOID:154  IAO:0000115  A cell type cancer that has_material_basis_in abnormally proliferating cells derives_from two germinal layers of tissue.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007641""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://medical-dictionary.thefreedictionary.com/mixed+neoplasm""}]}"