user: Question: What date was the game played on the Hard surface at the Tournament of Sweden F2?
Columns: ['Date', 'Tournament', 'Surface', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['18 June 2007', 'Ireland F1', 'Carpet', 'Colin Ebelthite', '2–6, 3–6']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Surface" = 'Hard' AND "Tournament" = 'Sweden F2';