assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8394  rdfs:subClassOf  DOID:5331  _IRI        
1          0           graph  DOID:5331  oio:id           DOID:5331  xsd:string  
1          0           graph  DOID:6032  rdfs:subClassOf  DOID:5331  _IRI