Table:
text: 1991 Minnesota Vikings season
Schedule
Schedule
Week Date_ Opponent Result_ Attendance
1 September 1, 1991 at Chicago Bears L 10-6 64112
2 September 8, 1991 at Atlanta Falcons W 20-19 50936
3 September 15, 1991 San Francisco 49ers W 17-14 59148
4 September 22, 1991 at New Orleans Saints L 26-0 68591
5 September 29, 1991 Denver Broncos L 13-6 55031
6 October 6, 1991 at Detroit Lions L 24-20 63423
7 October 13, 1991 Phoenix Cardinals W 34-7 51209
8 October 20, 1991 at New England Patriots L 26-23 (OT) 45367
9 October 27, 1991 at Phoenix Cardinals W 28-0 45447

Question: When was the W 20-19 for the Minnesota Vikings 1991 season?