user: Question: Which Extra points is the highest one that has a Player of herrnstein, and Points smaller than 30?
Columns: ['Player', 'Touchdowns', 'Extra points', 'Field goals', 'Points']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Herrnstein', 6.0, 0.0, 0.0, 30.0]
SQL:

assistant: SELECT MAX("Extra points") FROM "Table" WHERE "Player" = 'herrnstein' AND "Points" < 30.0;