assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:6945   rdfs:subClassOf  DOID:6498  _IRI        
1          0           graph  DOID:6944   rdfs:subClassOf  DOID:6498  _IRI        
1          0           graph  DOID:11685  rdfs:subClassOf  DOID:6498  _IRI        
1          0           graph  DOID:11684  rdfs:subClassOf  DOID:6498  _IRI        
1          0           graph  DOID:6498   oio:id           DOID:6498  xsd:string