Question: Count the total number of launch site of the rockets which have been launched form Cape Canaveral Air Force Station ?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT COUNT(?uri) WHERE { ?x onto:launchSite <http://dbpedia.org/resource/Cape_Canaveral_Air_Force_Station> . ?x onto:launchSite ?uri }