assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8426  rdfs:subClassOf  DOID:5375  _IRI        
1          0           graph  DOID:5375  oio:id           DOID:5375  xsd:string  
1          0           graph  DOID:5374  rdfs:subClassOf  DOID:5375  _IRI