user: Question: On what date did the audience of 60092 people watched a game end with a W 21-9?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 2, 1984', 'at Detroit Lions', 'W 30-27', 56782.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Attendance" > 60092.0 AND "Result" = 'W 21-9';