assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7609  rdfs:subClassOf  DOID:7608  _IRI        
1          0           graph  DOID:7608  oio:id           DOID:7608  xsd:string  
1          0           graph  DOID:7607  rdfs:subClassOf  DOID:7608  _IRI        
1          0           graph  DOID:7611  rdfs:subClassOf  DOID:7608  _IRI        
1          0           graph  DOID:7610  rdfs:subClassOf  DOID:7608  _IRI