Question: What are the american football players whose former team's coach is Jason Maas?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/coach> <http://dbpedia.org/resource/Jason_Maas> . ?uri <http://dbpedia.org/ontology/formerTeam> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/AmericanFootballPlayer>}