user: Question: What is the highest week that was played against the Minnesota Vikings?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 6, 1998', 'Pittsburgh Steelers', 'L 20–13', '0–1–0', '68,847']
SQL:

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