user: Question: On what type of surface was the tournament of Italy F28?
Columns: ['Date', 'Tournament', 'Surface', 'Partner', 'Opponent in the final', 'Score in the final']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['11 July 2005', 'U.S.A. F17 ( Peoria )', 'Clay (Outdoor)', 'Alexandre Simoni', 'David Martin Jeremy Wurtzman', '6–3, 7–6(7)']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Tournament" = 'Italy F28';