user: Question: What is the constructor of the race with Juan Manuel Fangio as the fastest lap and Giuseppe Farina as the winning driver?
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: ['Swiss Grand Prix', 'Bremgarten', '27 May', 'Juan Manuel Fangio', 'Juan Manuel Fangio', 'Juan Manuel Fangio', 'Alfa Romeo', 'P', 'Report']
SQL:

assistant: SELECT "Constructor" FROM "Table" WHERE "Fastest lap" = 'Juan Manuel Fangio' AND "Winning driver" = 'Giuseppe Farina';