user: Question: What is the lowest week that has Minnesota Vikings as the opponent?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 13, 1964', 'at San Francisco 49ers', 'W 26-17', 33204.0]
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Opponent" = 'Minnesota Vikings';