assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0050608  rdfs:subClassOf  DOID:3369  _IRI        
1          0           graph  DOID:3369     oio:id           DOID:3369  xsd:string  
1          0           graph  DOID:3368     rdfs:subClassOf  DOID:3369  _IRI        
1          0           graph  DOID:4232     rdfs:subClassOf  DOID:3369  _IRI