assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080708  rdfs:subClassOf  DOID:0080706  _IRI        
1          0           graph  DOID:0080707  rdfs:subClassOf  DOID:0080706  _IRI        
1          0           graph  DOID:0080706  oio:id           DOID:0080706  xsd:string