Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | September 9, 1990 | at Los Angeles Raiders | L 14–9 | 54,206 |
| 2.0 | September 17, 1990 | Kansas City Chiefs | W 24–23 | 75,277 |
| 3.0 | September 23, 1990 | Seattle Seahawks | W 34–31 | 75,290 |
| 4.0 | September 30, 1990 | at Buffalo Bills | L 29–28 | 74,393 |
| 5.0 | October 8, 1990 | Cleveland Browns | L 30–29 | 74,814 |
| 6.0 | October 14, 1990 | Pittsburgh Steelers | L 34–17 | 74,285 |
| 7.0 | October 21, 1990 | at Indianapolis Colts | W 27–17 | 59,850 |
| 8.0 | Bye | Bye | Bye | Bye |
| 9.0 | November 4, 1990 | at Minnesota Vikings | L 27–22 | 57,331 |
| 10.0 | November 11, 1990 | at San Diego Chargers | L 19–7 | 59,557 |
| 11.0 | November 18, 1990 | Chicago Bears | L 16–13 | 75,013 |
| 12.0 | November 22, 1990 | at Detroit Lions | L 40–27 | 73,896 |
| 13.0 | December 2, 1990 | Los Angeles Raiders | L 23–20 | 74,162 |
| 14.0 | December 9, 1990 | at Kansas City Chiefs | L 31–20 | 74,347 |
| 15.0 | December 16, 1990 | San Diego Chargers | W 20–10 | 64,919 |
| 16.0 | December 23, 1990 | at Seattle Seahawks | L 17–12 | 55,845 |
| 17.0 | December 30, 1990 | Green Bay Packers | W 22–13 | 46,943 |
Question:
Who is the opponent when the attendance is 57,331?
Answer:
at Minnesota Vikings