assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080877  rdfs:subClassOf  DOID:0080875  _IRI        
1          0           graph  DOID:0080875  oio:id           DOID:0080875  xsd:string  
1          0           graph  DOID:0081257  rdfs:subClassOf  DOID:0080875  _IRI        
1          0           graph  DOID:0081256  rdfs:subClassOf  DOID:0080875  _IRI