user: Question: What countries have a margin of victory at 6 strokes?
Columns: ['Year', 'Dates', 'Champion', 'Country', 'Score', 'To par', 'Margin of victory', 'Purse ( US$ )', 'Winners share']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: [2012.0, 'Jul 26–29', 'Inbee Park', 'South Korea', '71-64-70-66=271', '–17', '2 strokes', 3250000.0, 487500.0]
SQL:

assistant: SELECT "Country" FROM "Table" WHERE "Margin of victory" = '6 strokes';