assertion  retraction  graph  subject    predicate            object                                     datatype    annotation
1          0           graph  DOID:6571  rdfs:label           non-invasive bladder urothelial carcinoma  xsd:string  
1          0           graph  DOID:6571  oio:id               DOID:6571                                  xsd:string  
1          0           graph  DOID:6571  oio:hasOBONamespace  disease_ontology                           xsd:string  
1          0           graph  DOID:6571  rdfs:subClassOf      DOID:4006                                  _IRI        
1          0           graph  DOID:6571  rdf:type             owl:Class                                  _IRI