user: ### NOW ANSWER:
Question: Which circuit did Michael Andretti win?
Columns: ['Race Name', 'Circuit', 'City/Location', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Winning team', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Marlboro Grand Prix of Miami Presented by Toyota', 'Homestead-Miami Speedway', 'Homestead, Florida', 'March 2', 'Alex Zanardi', 'Michael Andretti', 'Michael Andretti', 'Newman/Haas Racing', 'Report']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "Winning driver" = 'Michael Andretti';