user: Question: What county won in 1991?
Columns: ['Player', 'Country', 'Year(s) won', 'Total', 'To par', 'Finish']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Greg Norman', 'Australia', '1986', 267.0, '–13', '1']
SQL:

assistant: SELECT "Country" FROM "Table" WHERE "Year(s) won" = '1991';