Question: Which country has leaders  Karu Jayasuriya and Ranil Wickremesinghe?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/ontology/leader> <http://dbpedia.org/resource/Karu_Jayasuriya> . ?uri <http://dbpedia.org/ontology/leader> <http://dbpedia.org/resource/Ranil_Wickremesinghe> . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Country>}