What was the production code of the episode that was written by michael dante dimartino and directed by lauren macmullan?
CREATE TABLE "table1_14562722_1" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "production_code" FROM "table1_14562722_1" WHERE "written_by"='Michael Dante DiMartino' AND "directed_by"='Lauren MacMullan';