How many cup goals for the season with more than 34 league apps?
CREATE TABLE "swindon_town_career_details" (
  "season" text,
  "team" text,
  "league_apps" real,
  "league_goals" real,
  "cup_apps" real,
  "cup_goals" real
);
SELECT AVG("cup_goals") FROM "swindon_town_career_details" WHERE "league_apps">34;