Which basketball players have played in the league of National Basketball Association?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/league> <http://dbpedia.org/resource/National_Basketball_Association>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/BasketballPlayer>}
National_Basketball_Association