assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8072  rdfs:subClassOf  DOID:4928  _IRI        
1          0           graph  DOID:4928  oio:id           DOID:4928  xsd:string  
1          0           graph  DOID:4927  rdfs:subClassOf  DOID:4928  _IRI        
1          0           graph  DOID:7733  rdfs:subClassOf  DOID:4928  _IRI        
1          0           graph  DOID:7642  rdfs:subClassOf  DOID:4928  _IRI        
1          0           graph  DOID:7024  rdfs:subClassOf  DOID:4928  _IRI