What is the timeslor rank for the episode with larger than 2.9 rating, rating/share of 2.6/8 and rank for the night higher than 5?
CREATE TABLE "the_biggest_loser_u_s_tv_series" (
  "episode" real,
  "rating" real,
  "share" real,
  "rating_share_18_49" text,
  "rank_timeslot" real,
  "rank_night" real
);
SELECT AVG("rank_timeslot") FROM "the_biggest_loser_u_s_tv_series" WHERE "rating">2.9 AND "rating_share_18_49"='2.6/8' AND "rank_night">5;