user: Question: Which Surface has a Score of 2009 WTA Tour?
Columns: ['Player', 'Ranking', 'Event', 'Surface', 'Round', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2008 WTA Tour', '2008 WTA Tour', '2008 WTA Tour', '2008 WTA Tour', '2008 WTA Tour', '2008 WTA Tour']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Score" = '2009 WTA Tour';