What is the number of games played for the team with 12 points and an against smaller than 52?
CREATE TABLE "australasia_pool_a" (
  "club" text,
  "played" real,
  "lost" real,
  "drawn" real,
  "against" real,
  "diff" real,
  "points" real
);
SELECT AVG("played") FROM "australasia_pool_a" WHERE "points"=12 AND "against"<52;