assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5527  rdfs:subClassOf  DOID:4932  _IRI        
1          0           graph  DOID:3502  rdfs:subClassOf  DOID:4932  _IRI        
1          0           graph  DOID:4932  oio:id           DOID:4932  xsd:string  
1          0           graph  DOID:7136  rdfs:subClassOf  DOID:4932  _IRI