user: Question: What is the aspect ratio for the September 1, 2009 release?
Columns: ['DVD title', 'Season', 'Aspect ratio', 'Episode count', 'Time length', 'Release date']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Ben 10: Alien Force Volume 1', 'Season One', '4:3', 5.0, '110 Minutes', 'October 21, 2008']
SQL:

assistant: SELECT "Aspect ratio" FROM "Table" WHERE "Release date" = 'September 1, 2009';