assertion  retraction  graph  subject     predicate        object      datatype    annotation
1          0           graph  DOID:11817  oio:id           DOID:11817  xsd:string  
1          0           graph  DOID:5958   rdfs:subClassOf  DOID:11817  _IRI        
1          0           graph  DOID:7694   rdfs:subClassOf  DOID:11817  _IRI