assertion  retraction  graph  subject       predicate        object   datatype    annotation
1          0           graph  DOID:0050622  rdfs:subClassOf  DOID:15  _IRI        
1          0           graph  DOID:229      rdfs:subClassOf  DOID:15  _IRI        
1          0           graph  DOID:48       rdfs:subClassOf  DOID:15  _IRI        
1          0           graph  DOID:15       oio:id           DOID:15  xsd:string  
1          0           graph  DOID:5223     rdfs:subClassOf  DOID:15  _IRI        
1          0           graph  DOID:193      rdfs:subClassOf  DOID:15  _IRI