assertion  retraction  graph  subject     predicate            object                 datatype    annotation
1          0           graph  DOID:60004  rdfs:label           malignant cystadenoma  xsd:string  
1          0           graph  DOID:60004  oio:id               DOID:60004             xsd:string  
1          0           graph  DOID:60004  oio:hasOBONamespace  disease_ontology       xsd:string  
1          0           graph  DOID:60004  rdfs:subClassOf      DOID:0080364           _IRI        
1          0           graph  DOID:60004  rdf:type             owl:Class              _IRI