Question: What are some countries where companies headquartered in the Klang Valley operate?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/headquarters> <http://dbpedia.org/resource/Klang_Valley> . ?x <http://dbpedia.org/property/country> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Company>}