user: Question: what is the date when the round is QF?
Columns: ['Date', 'Round', 'Opponent', 'Venue', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['28 January 1989', 'R3', 'Raith Rovers', 'A', '1–1', 10500.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Round" = 'QF';