assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8020  rdfs:subClassOf  DOID:5238  _IRI        
1          0           graph  DOID:6906  rdfs:subClassOf  DOID:5238  _IRI        
1          0           graph  DOID:2436  rdfs:subClassOf  DOID:5238  _IRI        
1          0           graph  DOID:5238  oio:id           DOID:5238  xsd:string