In how many different places were the people born who are members of National Museum of Racing and Hall of Fame?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/honours> <http://dbpedia.org/resource/National_Museum_of_Racing_and_Hall_of_Fame> . ?x <http://dbpedia.org/property/birthPlace> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Place>}
National_Museum_of_Racing_and_Hall_of_Fame