assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0060888  rdfs:subClassOf  DOID:2226  _IRI        
1          0           graph  DOID:2226     oio:id           DOID:2226  xsd:string  
1          0           graph  DOID:2224     rdfs:subClassOf  DOID:2226  _IRI        
1          0           graph  DOID:0111344  rdfs:subClassOf  DOID:2226  _IRI        
1          0           graph  DOID:8997     rdfs:subClassOf  DOID:2226  _IRI