assertion  retraction  graph  subject    predicate            object                        datatype    annotation
1          0           graph  DOID:3749  rdfs:label           urethral verrucous carcinoma  xsd:string  
1          0           graph  DOID:3749  oio:inSubset         obo:doid#NCIthesaurus         _IRI        
1          0           graph  DOID:3749  oio:id               DOID:3749                     xsd:string  
1          0           graph  DOID:3749  oio:hasOBONamespace  disease_ontology              xsd:string  
1          0           graph  DOID:3749  oio:hasDbXref        UMLS_CUI:C1519827             xsd:string  
1          0           graph  DOID:3749  oio:hasDbXref        NCI:C39874                    xsd:string  
1          0           graph  DOID:3749  rdfs:subClassOf      DOID:3750                     _IRI        
1          0           graph  DOID:3749  rdf:type             owl:Class                     _IRI