Which Touchdowns have an Extra points smaller than 5, and a Player of clark, and Field goals larger than 0?
CREATE TABLE "michigan_48_ohio_northern_0" (
  "player" text,
  "touchdowns" real,
  "extra_points" real,
  "field_goals" real,
  "points" real
);
SELECT AVG("touchdowns") FROM "michigan_48_ohio_northern_0" WHERE "extra_points"<5 AND "player"='clark' AND "field_goals">0;