assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5648  rdfs:subClassOf  DOID:3540  _IRI        
1          0           graph  DOID:3545  rdfs:subClassOf  DOID:3540  _IRI        
1          0           graph  DOID:3542  rdfs:subClassOf  DOID:3540  _IRI        
1          0           graph  DOID:3540  oio:id           DOID:3540  xsd:string  
1          0           graph  DOID:4584  rdfs:subClassOf  DOID:3540  _IRI