Can you tell me the average Conference Finals that has Finals smaller than 5?
CREATE TABLE "numbers_of_moments_by_decades" (
  "first_round" text,
  "semifinals" real,
  "conference_finals" real,
  "finals" real,
  "total" real
);
SELECT AVG("conference_finals") FROM "numbers_of_moments_by_decades" WHERE "finals"<5;