assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0080915  rdfs:subClassOf  DOID:5621  _IRI        
1          0           graph  DOID:7849     rdfs:subClassOf  DOID:5621  _IRI        
1          0           graph  DOID:7848     rdfs:subClassOf  DOID:5621  _IRI        
1          0           graph  DOID:5621     oio:id           DOID:5621  xsd:string  
1          0           graph  DOID:7146     rdfs:subClassOf  DOID:5621  _IRI