What is the lowest number of played of the team with 18 points and a position greater than 5?
CREATE TABLE "campeonato_paulista" (
  "position" real,
  "team" text,
  "points" real,
  "played" real,
  "drawn" real,
  "lost" real,
  "against" real,
  "difference" text
);
SELECT MIN("played") FROM "campeonato_paulista" WHERE "points"=18 AND "position">5;