assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7827  rdfs:subClassOf  DOID:3357  _IRI        
1          0           graph  DOID:3357  oio:id           DOID:3357  xsd:string  
1          0           graph  DOID:7297  rdfs:subClassOf  DOID:3357  _IRI