What is the rating for the episode with the night rank of 11 and timeslot rank is larger than 4?
CREATE TABLE "weekly_ratings" (
  "episode" text,
  "air_date" text,
  "rating" real,
  "share" real,
  "rating_share_18_49" text,
  "viewers_m" real,
  "timeslot_rank" real,
  "night_rank" text,
  "overall_rank" real
);
SELECT AVG("rating") FROM "weekly_ratings" WHERE "night_rank"='11' AND "timeslot_rank">4;