user: Question: Which Tournament has a Surface of Hard, and a Date of 24 September 2011?
Columns: ['Date', 'Tournament', 'Surface', 'Partnering', 'Opponents', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['29 June 2004', 'Mantua , Italy', 'Clay', 'Alessandro Motti', 'Daniele Bracciali Giorgio Galimberti', '6–0, 6–4']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "Surface" = 'Hard' AND "Date" = '24 September 2011';