Which average wins have a Club of barcelona atlètic, and Goals for larger than 56?
CREATE TABLE "group_b_relegation" (
  "position" real,
  "club" text,
  "played" real,
  "points" text,
  "wins" real,
  "draws" real,
  "losses" real,
  "goals_for" real,
  "goals_against" real,
  "goal_difference" real
);
SELECT AVG("wins") FROM "group_b_relegation" WHERE "club"='barcelona atlètic' AND "goals_for">56;