user: ### NOW ANSWER:
Question: Name the most extra points for John Heston
Columns: ['Player', 'Touchdowns', 'Extra points', 'Field goals', 'Points']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Harry Newman', 3.0, 7.0, 2.0, 28.0]
SQL:

assistant: SELECT MAX("Extra points") FROM "Table" WHERE "Player" = 'John Heston';