assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:10811  rdfs:subClassOf  DOID:2163  _IRI        
1          0           graph  DOID:6148   rdfs:subClassOf  DOID:2163  _IRI        
1          0           graph  DOID:2163   oio:id           DOID:2163  xsd:string  
1          0           graph  DOID:4483   rdfs:subClassOf  DOID:2163  _IRI        
1          0           graph  DOID:9310   rdfs:subClassOf  DOID:2163  _IRI