assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5758  oio:id           DOID:5758  xsd:string  
1          0           graph  DOID:5894  rdfs:subClassOf  DOID:5758  _IRI        
1          0           graph  DOID:5893  rdfs:subClassOf  DOID:5758  _IRI