user: Question: When did they play at Candlestick Park?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 10, 1989', 'at Miami Dolphins', 'W 27–24', '1–0', 'Joe Robbie Stadium', 54541.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Game Site" = 'Candlestick Park';