user: Question: Which country is T3 finisher Billy Mayfair from?
Columns: ['Place', 'Player', 'Country', 'Score', 'To par', 'Money ( £ )']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['1', 'David Duval', 'United States', '69-73-65-67=274', '−10', 600000.0]
SQL:

assistant: SELECT "Country" FROM "Table" WHERE "Place" = 'T3' AND "Player" = 'Billy Mayfair';