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 | Record | Attendance |
| --- | --- | --- | --- | --- | --- |
| 1.0 | September 1, 1991 | Seattle Seahawks | W 27-24 | 1-0 | 68,492 |
| 2.0 | September 8, 1991 | at Kansas City Chiefs | W 17-10 | 2-0 | 74,816 |
| 3.0 | September 15, 1991 | Los Angeles Rams | W 24-7 | 3-0 | 68,583 |
| 4.0 | September 22, 1991 | Minnesota Vikings | W 26-0 | 4-0 | 68,591 |
| 5.0 | September 29, 1991 | at Atlanta Falcons | W 27-6 | 5-0 | 56,556 |
| 6.0 | Bye | Bye | Bye | Bye | Bye |
| 7.0 | October 13, 1991 | at Philadelphia Eagles | W 13-6 | 6-0 | 64,224 |
| 8.0 | October 20, 1991 | Tampa Bay Buccaneers | W 23-7 | 7-0 | 68,591 |
| 9.0 | October 27, 1991 | Chicago Bears | L 20-17 | 7-1 | 68,591 |
| 10.0 | November 3, 1991 | at Los Angeles Rams | W 24-17 | 8-1 | 58,713 |
| 11.0 | November 10, 1991 | San Francisco 49ers | W 10-3 | 9-1 | 68,591 |
| 12.0 | November 17, 1991 | at San Diego Chargers | L 24-21 | 9-2 | 48,420 |
| 13.0 | November 24, 1991 | Atlanta Falcons | L 23-20 | 9-3 | 68,591 |
| 14.0 | December 1, 1991 | at San Francisco 49ers | L 38-24 | 9-4 | 62,092 |
| 15.0 | December 8, 1991 | at Dallas Cowboys | L 23-14 | 9-5 | 64,530 |
| 16.0 | December 16, 1991 | Los Angeles Raiders | W 27-0 | 10-5 | 68,625 |
| 17.0 | December 22, 1991 | at Phoenix Cardinals | W 27-3 | 11-5 | 30,928 |
Question:
On what date was the Opponent Chicago Bears?
Answer:
October 27, 1991