user: Question: Who is the winning drive of IV Grand Prix de Caen?
Columns: ['Race Name', 'Circuit', 'Date', 'Winning driver', 'Constructor', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['X Gran Premio Ciudad de Buenos Aires', 'Mendoza', '5 February', 'Juan Manuel Fangio', 'Lancia - Ferrari', 'Report']
SQL:

assistant: SELECT "Winning driver" FROM "Table" WHERE "Race Name" = 'IV Grand Prix de Caen';