assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5518  rdfs:subClassOf  DOID:3449  _IRI        
1          0           graph  DOID:3449  oio:id           DOID:3449  xsd:string  
1          0           graph  DOID:3448  rdfs:subClassOf  DOID:3449  _IRI        
1          0           graph  DOID:4277  rdfs:subClassOf  DOID:3449  _IRI