user: Question: What surface has Natalia Gussoni as the partner?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponent in the final', 'Score in the final']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', 'November 3, 2002', 'ITF $10,000 Stockholm , Sweden', 'Hard', 'Elke Clijsters', 'Jenny Loow Suzanne van Hartingsveldt', '6-1 6-1']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Partner" = 'Natalia Gussoni';