assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:718      rdfs:subClassOf  DOID:0060050  _IRI        
1          0           graph  DOID:8925     rdfs:subClassOf  DOID:0060050  _IRI        
1          0           graph  DOID:0060050  oio:id           DOID:0060050  xsd:string  
1          0           graph  DOID:12132    rdfs:subClassOf  DOID:0060050  _IRI