How many Points against has Tries for smaller than 14, and a Team of llanelli?
CREATE TABLE "pool_2" (
  "team" text,
  "tries_for" real,
  "tries_against" real,
  "try_diff" text,
  "points_for" real,
  "points_against" real,
  "points_diff" text
);
SELECT AVG("points_against") FROM "pool_2" WHERE "tries_for"<14 AND "team"='llanelli';