Which companies have launched a rocket from Cape Canaveral Air Force station?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/launchSite> <http://dbpedia.org/resource/Cape_Canaveral_Air_Force_Station> . ?x <http://dbpedia.org/ontology/manufacturer> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Rocket>}
Cape_Canaveral_Air_Force_Station