user: Question: How many extra points catagories are there for the na player? 
Columns: ['Player', 'Touchdowns', 'Extra points', 'Field goals', 'Safeties', 'Points']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Bennie Oosterbaan', 8.0, 0.0, 0.0, 0.0, 48.0]
SQL:

assistant: SELECT COUNT("Extra points") FROM "Table" WHERE "Player" = 'na';