assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:2766  rdfs:subClassOf  DOID:1363  _IRI        
1          0           graph  DOID:2764  rdfs:subClassOf  DOID:1363  _IRI        
1          0           graph  DOID:2763  rdfs:subClassOf  DOID:1363  _IRI        
1          0           graph  DOID:1363  oio:id           DOID:1363  xsd:string