user: Question: Which Surface has a Partner of Jim Thomas, and a Date of 2007?
Columns: ['Outcome', 'Date', 'Surface', 'Partner', 'Opponents in the final', 'Score in the final']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Winner', 2003.0, 'Grass', 'David Macpherson', 'Julian Knowle Jürgen Melzer', '7–6 (7–4) , 6–3']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Partner" = 'Jim Thomas' AND "Date" = 2007.0;