user: Question: Name the winning driver for Belgian 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: ['Monaco Grand Prix', 'Monaco', '26 May', 'Jim Clark', 'John Surtees', 'Graham Hill', 'BRM', 'D', 'Report']
SQL:

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