assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:9352  rdfs:subClassOf  DOID:9351  _IRI        
1          0           graph  DOID:9351  oio:id           DOID:9351  xsd:string  
1          0           graph  DOID:9744  rdfs:subClassOf  DOID:9351  _IRI