user: Question: Which country has a Year(s) won in 1964?
Columns: ['Player', 'Country', 'Year(s) won', 'Total', 'To par', 'Finish']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Lee Trevino', 'United States', '1974 , 1984', 280.0, '–4', '2']
SQL:

assistant: SELECT "Country" FROM "Table" WHERE "Year(s) won" = '1964';