What is the average Viewers (m) for "aka", with a Rating larger than 3.3?
CREATE TABLE "u_s_nielsen_weekly_ratings" (
  "episode" text,
  "rating" real,
  "share" real,
  "18_49_rating_share" text,
  "viewers_m" real
);
SELECT AVG("viewers_m") FROM "u_s_nielsen_weekly_ratings" WHERE "episode"='\"aka\"' AND "rating">3.3;