assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:14491  rdfs:subClassOf  DOID:4939  _IRI        
1          0           graph  DOID:4939   oio:id           DOID:4939  xsd:string  
1          0           graph  DOID:4938   rdfs:subClassOf  DOID:4939  _IRI        
1          0           graph  DOID:5539   rdfs:subClassOf  DOID:4939  _IRI        
1          0           graph  DOID:6888   rdfs:subClassOf  DOID:4939  _IRI