user: Question: How many opponents did the team play in week 13?
Columns: ['Game', 'Date', 'Opponent', 'Result', 'Bills points', 'Opponents', 'Bills first downs', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real', 'text', 'real']
Sample row: [1.0, 'Sept. 16', 'Oakland Raiders', 'Win', 21.0, 20.0, 22.0, '1–0', 80020.0]
SQL:

assistant: SELECT COUNT("Opponents") FROM "Table" WHERE "Game" = 13.0;