assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6869  rdfs:subClassOf  DOID:6114  _IRI        
1          0           graph  DOID:6114  oio:id           DOID:6114  xsd:string  
1          0           graph  DOID:8000  rdfs:subClassOf  DOID:6114  _IRI