user: Question: What is the Surface when Todd Woodbridge was the Runner-up, and a Date of 24 February 1997?
Columns: ['Outcome', 'Date', 'Championship', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '20 August 1990', 'New Haven , USA', 'Hard', 'Derrick Rostagno', '3–6, 3–6']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Outcome" = 'Runner-up' AND "Date" = '24 February 1997';