Question: Name all the hubs of the airlines whose one of the hubs is Selangir ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/hubs> <http://dbpedia.org/resource/Selangor> . ?x <http://dbpedia.org/property/hubs> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Airline>}