assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:4813  oio:id           DOID:4813  xsd:string  
1          0           graph  DOID:4812  rdfs:subClassOf  DOID:4813  _IRI        
1          0           graph  DOID:5922  rdfs:subClassOf  DOID:4813  _IRI        
1          0           graph  DOID:5921  rdfs:subClassOf  DOID:4813  _IRI