Question: List the launch site of the rockets whose one of the launch site has been Cape Canaveral Air Force Station Launch Complex 26 ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/launchSite> <http://dbpedia.org/resource/Cape_Canaveral_Air_Force_Station_Launch_Complex_26> . ?x <http://dbpedia.org/ontology/launchSite> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Rocket>}