assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8533  oio:id           DOID:8533  xsd:string  
1          0           graph  DOID:8663  rdfs:subClassOf  DOID:8533  _IRI        
1          0           graph  DOID:9235  rdfs:subClassOf  DOID:8533  _IRI        
1          0           graph  DOID:8660  rdfs:subClassOf  DOID:8533  _IRI