assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6559  rdfs:subClassOf  DOID:1364  _IRI        
1          0           graph  DOID:6854  rdfs:subClassOf  DOID:1364  _IRI        
1          0           graph  DOID:1364  oio:id           DOID:1364  xsd:string  
1          0           graph  DOID:6562  rdfs:subClassOf  DOID:1364  _IRI