To what region is Sukhumbhand Paribatra, a leader?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/leaderName> <http://dbpedia.org/resource/Sukhumbhand_Paribatra>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Region>}
Sukhumbhand_Paribatra