assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080705  rdfs:subClassOf  DOID:0080703  _IRI        
1          0           graph  DOID:0080704  rdfs:subClassOf  DOID:0080703  _IRI        
1          0           graph  DOID:0080703  oio:id           DOID:0080703  xsd:string