assertion  retraction  graph  subject     predicate        object    datatype  annotation
1          0           graph  DOID:2043   rdfs:subClassOf  DOID:934  _IRI      
1          0           graph  DOID:1273   rdfs:subClassOf  DOID:934  _IRI      
1          0           graph  DOID:8970   rdfs:subClassOf  DOID:934  _IRI      
1          0           graph  DOID:14472  rdfs:subClassOf  DOID:934  _IRI