assertion  retraction  graph  subject    predicate    object                                                                                          datatype    annotation
1          0           graph  DOID:7461  IAO:0000115  A breast squamous cell carcinoma characterized by large epithelial cells that contain keratin.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007636""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://ncim.nci.nih.gov/ncimbrowser/ConceptReport.jsp?dictionary=NCI%20Metathesaurus&code=C1519486""}]}"