query: How many professional football teams are there in Canada?
passage: Canadian Football League
The Canadian Football League (CFL; French: Ligue canadienne de football, LCF) is a professional sports league in Canada. The CFL is the highest level of competition in Canadian football. Its nine teams, which are located in nine separate cities throughout Canada, are divided into two divisions: the East Division, with four teams, and the West Division with five teams.
passage: List of American and Canadian cities by number of major professional sports franchises
These four leagues are also commonly referred to as the "Big Four". Each of these is the richest professional club competition in its sport worldwide. The best players can become cultural icons in both countries and elsewhere in the world, because the leagues enjoy a significant place in popular culture in the U.S. and Canada. The NFL has 32 teams, the NHL has 31, and MLB and the NBA each have 30. The most recent market to receive its first "Big Four" team is Las Vegas, Nevada, which saw the NHL's Vegas Golden Knights make their debut for the 2017–18 season.