What is the production code for episode 229?
CREATE TABLE "table1_14889988_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT MAX("production_code") FROM "table1_14889988_1" WHERE "no_in_series"=229;