user: Question: On which date was the opponent the Chicago Bears?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 4, 1983', 'at Tampa Bay Buccaneers', 'W 11-0', 62154.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Chicago Bears';