assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6733  rdfs:subClassOf  DOID:5384  _IRI        
1          0           graph  DOID:8105  rdfs:subClassOf  DOID:5384  _IRI        
1          0           graph  DOID:5384  oio:id           DOID:5384  xsd:string