What is the american football league whose champion is from Kansas City, Missouri?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/city> <http://dbpedia.org/resource/Kansas_City,_Missouri> . ?uri <http://dbpedia.org/property/champion> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/AmericanFootballLeague>}
Kansas_City,_Missouri