user: Question: what is the date when the away team is Crystal Palace?
Columns: ['Tie no', 'Home team', 'Score', 'Away team', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Chesterfield', '1–0', 'Doncaster Rovers', '14 December 1974']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team" = 'Crystal Palace';