assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:5082   oio:id           DOID:5082  xsd:string  
1          0           graph  DOID:14018  rdfs:subClassOf  DOID:5082  _IRI        
1          0           graph  DOID:12236  rdfs:subClassOf  DOID:5082  _IRI