Question: List the former team of the american football players born in Pennsylvania ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/birthPlace> <http://dbpedia.org/resource/Pennsylvania> . ?x <http://dbpedia.org/ontology/formerTeam> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/AmericanFootballPlayer>}