In which city of Pittsburg Steelers was the Congress of Inductrial Organization founded ?
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Congress_of_Industrial_Organizations> <http://dbpedia.org/property/founded> ?uri. <http://dbpedia.org/resource/Pittsburgh_Steelers> <http://dbpedia.org/property/city> ?uri}
Congress_of_Industrial_Organizations Pittsburgh_Steelers