Give me a count of airlines whose hub airport is Los Angeles International Airport?
SELECT DISTINCT COUNT(?uri) WHERE {?uri <http://dbpedia.org/ontology/hubAirport> <http://dbpedia.org/resource/Los_Angeles_International_Airport>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Airline>}
Los_Angeles_International_Airport