assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:3919  rdfs:subClassOf  DOID:1795  _IRI        
1          0           graph  DOID:4905  rdfs:subClassOf  DOID:1795  _IRI        
1          0           graph  DOID:1795  oio:id           DOID:1795  xsd:string  
1          0           graph  DOID:7575  rdfs:subClassOf  DOID:1795  _IRI