user: Question: How many schools left in 2002-03?
Columns: ['Institution', 'Location', 'Founded', 'Type', 'Enrollment', 'Joined', 'Left', 'Nickname', 'Primary Conference when joining the MSFA', 'Current Primary Conference']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['University of Findlay', 'Findlay, Ohio', 1882.0, 'Private', 4600.0, '1994-95', '1997-98', 'Oilers', 'American Mideast', 'GLIAC (NCAA Division II)']
SQL:

assistant: SELECT COUNT("Location") FROM "Table" WHERE "Left" = '2002-03';