assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8051  rdfs:subClassOf  DOID:5306  _IRI        
1          0           graph  DOID:8050  rdfs:subClassOf  DOID:5306  _IRI        
1          0           graph  DOID:5306  oio:id           DOID:5306  xsd:string  
1          0           graph  DOID:6210  rdfs:subClassOf  DOID:5306  _IRI