Who have rented the stadium operated by Maple Leaf S&E?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/operator> <http://dbpedia.org/resource/Maple_Leaf_Sports_&_Entertainment> . ?x <http://dbpedia.org/ontology/tenant> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Stadium>}
Maple_Leaf_Sports_&_Entertainment