assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7042  rdfs:subClassOf  DOID:4352  _IRI        
1          0           graph  DOID:6524  rdfs:subClassOf  DOID:4352  _IRI        
1          0           graph  DOID:6523  rdfs:subClassOf  DOID:4352  _IRI        
1          0           graph  DOID:4352  oio:id           DOID:4352  xsd:string  
1          0           graph  DOID:6043  rdfs:subClassOf  DOID:4352  _IRI