What is the average of someone with more than 19 wickets and less than 16 matches?
CREATE TABLE "most_wickets" (
  "player" text,
  "team" text,
  "matches" real,
  "overs" real,
  "wickets" real,
  "economy_rate" real,
  "average" real,
  "strike_rate" real,
  "best_bowling" text
);
SELECT AVG("average") FROM "most_wickets" WHERE "wickets">19 AND "matches"<16;