assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5433  oio:id           DOID:5433  xsd:string  
1          0           graph  DOID:5432  rdfs:subClassOf  DOID:5433  _IRI        
1          0           graph  DOID:6065  rdfs:subClassOf  DOID:5433  _IRI