assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:4005  rdfs:subClassOf  DOID:2871  _IRI        
1          0           graph  DOID:2871  oio:id           DOID:2871  xsd:string  
1          0           graph  DOID:5533  rdfs:subClassOf  DOID:2871  _IRI        
1          0           graph  DOID:2870  rdfs:subClassOf  DOID:2871  _IRI