user: Question: How many tot officers were there on the date when the number of tot enlisted was 329640?
Columns: ['Date', 'Total USAAF', 'Tot Officers', 'Tot Enlisted', '# overseas', 'Officers o/s', 'Enlisted o/s']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['31 July 1939', 24724.0, 2636.0, 22088.0, 3991.0, 272.0, 3719.0]
SQL:

assistant: SELECT "Tot Officers" FROM "Table" WHERE "Tot Enlisted" = 329640.0;