assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6085  rdfs:subClassOf  DOID:6086  _IRI        
1          0           graph  DOID:7689  rdfs:subClassOf  DOID:6086  _IRI        
1          0           graph  DOID:6086  oio:id           DOID:6086  xsd:string