user: Question: What date was Leeds United the away team?
Columns: ['Tie no', 'Home team', 'Score', 'Away team', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Liverpool', '0–0', 'Leeds United', '5 February 1972']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team" = 'Leeds United';