user: Question: When Western Michigan is the tournament winner how many conferences are there?
Columns: ['Conference', 'Regular Season Winner', 'Conference Player of the Year', 'Conference Tournament', 'Tournament Venue (City)', 'Tournament Winner']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Atlantic 10 Conference', "St. Joseph's (East) Dayton (West)", "Jameer Nelson , St. Joseph's", "2004 Atlantic 10 Men's Basketball Tournament", 'University of Dayton Arena ( Dayton, Ohio )', 'Xavier']
SQL:

assistant: SELECT COUNT("Conference") FROM "Table" WHERE "Tournament Winner" = 'Western Michigan';