user: Question: On what date does Watford have a Tie no of 2?
Columns: ['Tie no', 'Home team', 'Score', 'Away team', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Sutton United', '1–1', 'Middlesbrough', '9 January 1988']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Home team" = 'Watford' AND "Tie no" = '2';