assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7174  rdfs:subClassOf  DOID:5525  _IRI        
1          0           graph  DOID:7173  rdfs:subClassOf  DOID:5525  _IRI        
1          0           graph  DOID:5525  oio:id           DOID:5525  xsd:string  
1          0           graph  DOID:7175  rdfs:subClassOf  DOID:5525  _IRI