assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0080617  rdfs:subClassOf  DOID:9942  _IRI        
1          0           graph  DOID:10619    rdfs:subClassOf  DOID:9942  _IRI        
1          0           graph  DOID:1602     rdfs:subClassOf  DOID:9942  _IRI        
1          0           graph  DOID:9942     oio:id           DOID:9942  xsd:string