Which Popular vote has a Liberal leader of king, and Seats won larger than 116, and a Year of 1921?
CREATE TABLE "liberal_party_federal_electoral_results" (
  "year" text,
  "seats_in_house" real,
  "liberal_candidates" real,
  "seats_won" real,
  "seat_change" text,
  "popular_vote" real,
  "pct_of_popular_vote" text,
  "result" text,
  "liberal_leader" text
);
SELECT AVG("popular_vote") FROM "liberal_party_federal_electoral_results" WHERE "liberal_leader"='king' AND "seats_won">116 AND "year"='1921';