assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6468  rdfs:subClassOf  DOID:5482  _IRI        
1          0           graph  DOID:5895  rdfs:subClassOf  DOID:5482  _IRI        
1          0           graph  DOID:5482  oio:id           DOID:5482  xsd:string