Question: Which current players once played for Toronto argonauts?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/formerTeam> <http://dbpedia.org/resource/Toronto_Argonauts>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/AmericanFootballPlayer>}