user: Question: Who was the winning driver on 30 May?
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: ['Argentine Grand Prix', 'Buenos Aires', '22 January', 'Juan Manuel Fangio', 'Juan Manuel Fangio', 'Luigi Musso Juan Manuel Fangio', 'Ferrari', 'E', 'Report']
SQL:

assistant: SELECT "Winning driver" FROM "Table" WHERE "Date" = '30 May';