assertion  retraction  graph  subject       predicate        object    datatype    annotation
1          0           graph  DOID:0050269  rdfs:subClassOf  DOID:121  _IRI        
1          0           graph  DOID:0060114  rdfs:subClassOf  DOID:121  _IRI        
1          0           graph  DOID:119      rdfs:subClassOf  DOID:121  _IRI        
1          0           graph  DOID:8920     rdfs:subClassOf  DOID:121  _IRI        
1          0           graph  DOID:121      oio:id           DOID:121  xsd:string