Who wrote the episode in the series 46b?
CREATE TABLE "aaahh_real_monsters_season_4_episodes" (
  "no_in_series" text,
  "no_in_season" text,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text
);
SELECT "written_by" FROM "aaahh_real_monsters_season_4_episodes" WHERE "no_in_series"='46b';