assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:4916     rdfs:subClassOf  DOID:1785  _IRI        
1          0           graph  DOID:5716     rdfs:subClassOf  DOID:1785  _IRI        
1          0           graph  DOID:0081244  rdfs:subClassOf  DOID:1785  _IRI        
1          0           graph  DOID:1785     oio:id           DOID:1785  xsd:string