user: Question: Which Affiliation has a Nickname of Cougars?
Columns: ['Institution', 'Location', 'Founded', 'Affiliation', 'Nickname']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Bradley University', 'Peoria, IL', 1897.0, 'Private/Non-sectarian', 'Braves']
SQL:

assistant: SELECT "Affiliation" FROM "Table" WHERE "Nickname" = 'Cougars';