What was the share for the first episode that ranked 85?
CREATE TABLE "season_1" (
  "no" real,
  "episode" text,
  "air_date" text,
  "timeslot" text,
  "rating" text,
  "share" real,
  "18_49_rating_share" text,
  "viewers_m" text,
  "rank_num" text
);
SELECT MIN("share") FROM "season_1" WHERE "rank_num"='85';