user: Question: Where attendance is 79,431 what is date?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 6, 1998', 'Oakland Raiders', 'W 28–8', '78,945']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Attendance" = '79,431';