assertion  retraction  graph  subject    predicate    object                                                                      datatype    annotation
1          0           graph  DOID:3973  IAO:0000115  A thyroid gland carcinoma that has_material_basis_in parafollicular cells.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Medullary_thyroid_cancer""}]}"