assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:707      rdfs:subClassOf  DOID:0060060  _IRI        
1          0           graph  DOID:0050744  rdfs:subClassOf  DOID:0060060  _IRI        
1          0           graph  DOID:0081312  rdfs:subClassOf  DOID:0060060  _IRI        
1          0           graph  DOID:0060060  oio:id           DOID:0060060  xsd:string