assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0060109  rdfs:subClassOf  DOID:2059  _IRI        
1          0           graph  DOID:0050269  rdfs:subClassOf  DOID:2059  _IRI        
1          0           graph  DOID:2059     oio:id           DOID:2059  xsd:string  
1          0           graph  DOID:1245     rdfs:subClassOf  DOID:2059  _IRI