Table: football_season_4
Columns: position
club
played
points
wins
draws
losses
goals_for
goals_against
goal_difference

Question: What is the lowest goal difference for the club ud alzira, with a played larger than 38?
SQL: SELECT MIN("goal_difference") FROM football_season_4 WHERE "club" = 'ud alzira' AND "played" > 38

Question: What is the goal difference sum that has goals against smaller than 33, draws larger than 13?
SQL: SELECT SUM("goal_difference") FROM football_season_4 WHERE "goals_against" < 33 AND "draws" > 13