Question: Timothy J. Leiweke is an American sports executive who was the former president and CEO of a professional sports and commercial real estate company and is based where?
Sentence (from "Maple Leaf Sports &amp; Entertainment"): With assets that include franchises in three of the six major professional sports leagues in the United States and Canada, it is the largest sports and entertainment company in Canada, and one of the largest in North America.
Relevant evidence: No