assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:1748  rdfs:subClassOf  DOID:5467  _IRI        
1          0           graph  DOID:1751  rdfs:subClassOf  DOID:5467  _IRI        
1          0           graph  DOID:5467  oio:id           DOID:5467  xsd:string