what is the rank (night) when the rating is more than 4.3 and the viewers (millions) is more than 10.72?
CREATE TABLE "u_s_nielsen_ratings" (
  "episode" text,
  "rating" real,
  "share" real,
  "rating_share_18_49" text,
  "viewers_millions" real,
  "rank_timeslot" real,
  "rank_night" real,
  "rank_week" text
);
SELECT AVG("rank_night") FROM "u_s_nielsen_ratings" WHERE "rating">4.3 AND "viewers_millions">10.72;