user: ### NOW ANSWER:
Question: When Tom Purtzer of the United States played what is the maximum score?
Columns: ['Place', 'Player', 'Country', 'Score', 'To par']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['1', 'Lee Trevino', 'United States', 67.0, '–5']
SQL:

assistant: SELECT MAX("Score") FROM "Table" WHERE "Country" = 'United States' AND "Player" = 'Tom Purtzer';