when did the club Citizen achieve its last top division title?
CREATE TABLE "2013_14_season" (
  "club" text,
  "position_in_2012_13" text,
  "first_season_in_top_division" text,
  "number_of_seasons_in_top_division" real,
  "first_season_of_current_spell_in_top_division" text,
  "top_division_titles" real,
  "last_top_division_title" text
);
SELECT "last_top_division_title" FROM "2013_14_season" WHERE "club"='Citizen';