user: Question: How many games have Air Force as the opponent?
Columns: ['Game', 'Date', 'Opponent', 'Result', 'Black Knights points', 'Opponents', 'Record']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'text']
Sample row: [1.0, 'Sept. 20', 'New Mexico', 'Win', 31.0, 14.0, '1-0-0']
SQL:

assistant: SELECT COUNT("Game") FROM "Table" WHERE "Opponent" = 'Air Force';