user: Question: Who was the winning driver for the Dutch Grand Prix?
Columns: ['Race', 'Circuit', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Constructor', 'Tyre', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['South African Grand Prix', 'Kyalami', '6 March', 'Jackie Stewart', 'Mario Andretti', 'Mario Andretti', 'Ferrari', 'F', 'Report']
SQL:

assistant: SELECT "Winning driver" FROM "Table" WHERE "Race" = 'Dutch Grand Prix';