Which lowest goals for number had a played number of less than 34?
CREATE TABLE "first_phase" (
  "position" real,
  "club" text,
  "played" real,
  "points" text,
  "wins" real,
  "draws" real,
  "losses" real,
  "goals_for" real,
  "goals_against" real,
  "goal_difference" real
);
SELECT MIN("goals_for") FROM "first_phase" WHERE "played"<34;