user: Question: What is the enrollment for the institution nicknamed the Panthers that left in 2012? 
Columns: ['Institution', 'Location', 'Founded', 'Type', 'Enrollment', 'Nickname', 'Joined', 'Left', 'Current Conference']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Birmingham–Southern College', 'Birmingham, Alabama', 1856.0, 'Private/United Methodist', 1600.0, 'Panthers', '2007', '2012', 'SAA']
SQL:

assistant: SELECT "Enrollment" FROM "Table" WHERE "Left" = '2012' AND "Nickname" = 'Panthers';