user: Question: How many opponents are at Minnesota Vikings?
Columns: ['Game', 'Date', 'Opponent', 'Result', 'Dolphins points', 'Opponents', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'text', 'real']
Sample row: [1.0, 'Sept. 2', 'at Buffalo Bills', 'Win', 9.0, 7.0, '1–0', 69441.0]
SQL:

assistant: SELECT COUNT("Opponents") FROM "Table" WHERE "Opponent" = 'at Minnesota Vikings';