assertion  retraction  graph  subject     predicate        object    datatype  annotation
1          0           graph  DOID:1909   rdfs:subClassOf  DOID:162  _IRI      
1          0           graph  DOID:219    rdfs:subClassOf  DOID:162  _IRI      
1          0           graph  DOID:1612   rdfs:subClassOf  DOID:162  _IRI      
1          0           graph  DOID:3355   rdfs:subClassOf  DOID:162  _IRI      
1          0           graph  DOID:10283  rdfs:subClassOf  DOID:162  _IRI