assertion  retraction  graph  subject     predicate        object      datatype    annotation
1          0           graph  DOID:11839  rdfs:subClassOf  DOID:11615  _IRI        
1          0           graph  DOID:11838  rdfs:subClassOf  DOID:11615  _IRI        
1          0           graph  DOID:11615  oio:id           DOID:11615  xsd:string  
1          0           graph  DOID:3449   rdfs:subClassOf  DOID:11615  _IRI