assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5439  rdfs:subClassOf  DOID:3896  _IRI        
1          0           graph  DOID:3896  oio:id           DOID:3896  xsd:string  
1          0           graph  DOID:5443  rdfs:subClassOf  DOID:3896  _IRI        
1          0           graph  DOID:2061  rdfs:subClassOf  DOID:3896  _IRI