user: Question: What brand of vehicle won a race driven by Tazio Nuvolari?
Columns: ['Name', 'Circuit', 'Date', 'Winning drivers', 'Winning constructor', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Monaco Grand Prix', 'Monaco', '23 April', 'Achille Varzi', 'Bugatti', 'Report']
SQL:

assistant: SELECT "Winning constructor" FROM "Table" WHERE "Winning drivers" = 'Tazio Nuvolari';