user: Question: On what date was the crowd size of 71,789?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 1, 1991', 'at New Orleans Saints', 'L 24-27', 'Louisiana Superdome', '0-1', '68,492']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Attendance" = '71,789';