assertion  retraction  graph  subject     predicate        object      datatype    annotation
1          0           graph  DOID:6936   rdfs:subClassOf  DOID:11885  _IRI        
1          0           graph  DOID:11888  rdfs:subClassOf  DOID:11885  _IRI        
1          0           graph  DOID:11887  rdfs:subClassOf  DOID:11885  _IRI        
1          0           graph  DOID:11885  oio:id           DOID:11885  xsd:string