assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0040044  rdfs:subClassOf  DOID:0040041  _IRI        
1          0           graph  DOID:0040043  rdfs:subClassOf  DOID:0040041  _IRI        
1          0           graph  DOID:0040042  rdfs:subClassOf  DOID:0040041  _IRI        
1          0           graph  DOID:0040041  oio:id           DOID:0040041  xsd:string  
1          0           graph  DOID:0040040  rdfs:subClassOf  DOID:0040041  _IRI