What is the average Wins, when Points is less than "19"?
CREATE TABLE "group_ii" (
  "position" real,
  "played" real,
  "points" real,
  "wins" real,
  "draws" real,
  "losses" real,
  "goals_for" real,
  "goals_against" real,
  "goal_difference" real
);
SELECT AVG("wins") FROM "group_ii" WHERE "points"<19;