user: Question: What is the Attendance of the game against minnesota vikings?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 15, 1963', 'Pittsburgh Steelers', 'T 21–21', 58205.0]
SQL:

assistant: SELECT "Attendance" FROM "Table" WHERE "Opponent" = 'minnesota vikings';