SCHEMA:
CREATE TABLE table_name_8 (touchdowns INTEGER, field_goals VARCHAR, extra_points VARCHAR, player VARCHAR)
USER:
Which Touchdowns have an Extra points smaller than 5, and a Player of clark, and Field goals larger than 0?

QUERY:
SELECT AVG(touchdowns) FROM table_name_8 WHERE extra_points < 5 AND player = "clark" AND field_goals > 0