user: Question: On what surface did Poland play as the against team?
Columns: ['Edition', 'Round', 'Date', 'Partnering', 'Against', 'Surface', 'Opponents', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2007 World Group II', 'PO', '15–07–07', 'Ana Timotić', 'Slovakia', 'Hard (i)', 'Husárová Juřičková', '4–6, 2–6']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Against" = 'Poland';