user: Question: Who was the winning driver in 1956?
Columns: ['Year', 'Date', 'Circuit', 'Winning driver', 'Winning constructor', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1965', '4 December', 'Kyalami', 'Jack Brabham', 'Brabham - Climax', 'Report']
SQL:

assistant: SELECT "Winning driver" FROM "Table" WHERE "Year" = '1956';