user: Question: In what year did the teams leave the conference?
Columns: ['Institution', 'Nickname', 'Location', 'Founded', 'Type', 'Enrollment', 'Joined', 'Left']
Types: ['text', 'text', 'text', 'real', 'text', 'real', 'real', 'real']
Sample row: ['University of Cincinnati', 'Bearcats', 'Cincinnati, Ohio', 1819.0, 'Public', 41357.0, 1991.0, 1995.0]
SQL:

assistant: SELECT "Left" FROM "Table";