user: Question: What race did Bobby Unser win?
Columns: ['Name', 'Pole Position', 'Fastest Lap', 'Winning driver', 'Winning team', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Datsun Twin 200', 'Johnny Rutherford', 'Unknown', 'Johnny Rutherford', 'Chaparral', 'Report']
SQL:

assistant: SELECT "Name" FROM "Table" WHERE "Winning driver" = 'Bobby Unser';