user: Question: What is the surface for the year 2001?
Columns: ['Outcome', 'Year', 'Championship', 'Surface', 'Opponent in the final', 'Score in the final']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Winner', 1998.0, 'Canada (Toronto)', 'Hard', 'Richard Krajicek', '7–6 (7–3) , 6–4']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Year" = 2001.0;