assertion  retraction  graph  subject     predicate        object      datatype    annotation
1          0           graph  DOID:12978  rdfs:subClassOf  DOID:12365  _IRI        
1          0           graph  DOID:12365  oio:id           DOID:12365  xsd:string  
1          0           graph  DOID:14067  rdfs:subClassOf  DOID:12365  _IRI