assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0081306  rdfs:subClassOf  DOID:5048  _IRI        
1          0           graph  DOID:5048     oio:id           DOID:5048  xsd:string  
1          0           graph  DOID:0081280  rdfs:subClassOf  DOID:5048  _IRI        
1          0           graph  DOID:5047     rdfs:subClassOf  DOID:5048  _IRI