What is the timeslot rank when the rating is smaller than 2.6 and the share is more than 4?
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"<2.6 AND "share">4;