assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:4659   rdfs:subClassOf  DOID:3664  _IRI        
1          0           graph  DOID:3666   rdfs:subClassOf  DOID:3664  _IRI        
1          0           graph  DOID:13005  rdfs:subClassOf  DOID:3664  _IRI        
1          0           graph  DOID:355    rdfs:subClassOf  DOID:3664  _IRI        
1          0           graph  DOID:3664   oio:id           DOID:3664  xsd:string  
1          0           graph  DOID:9254   rdfs:subClassOf  DOID:3664  _IRI