assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:1417     rdfs:subClassOf  DOID:3480  _IRI        
1          0           graph  DOID:3479     rdfs:subClassOf  DOID:3480  _IRI        
1          0           graph  DOID:0040088  rdfs:subClassOf  DOID:3480  _IRI        
1          0           graph  DOID:240      rdfs:subClassOf  DOID:3480  _IRI        
1          0           graph  DOID:3480     oio:id           DOID:3480  xsd:string