assertion  retraction  graph  subject     predicate        object    datatype  annotation
1          0           graph  DOID:639    rdfs:subClassOf  DOID:863  _IRI      
1          0           graph  DOID:437    rdfs:subClassOf  DOID:863  _IRI      
1          0           graph  DOID:10003  rdfs:subClassOf  DOID:863  _IRI      
1          0           graph  DOID:2377   rdfs:subClassOf  DOID:863  _IRI