CREATE TABLE table_14562722_1 (production_code VARCHAR, written_by VARCHAR, directed_by VARCHAR)

What was the production code of the episode that was written by michael dante dimartino and directed by lauren macmullan?
SELECT production_code FROM table_14562722_1 WHERE written_by = "Michael Dante DiMartino" AND directed_by = "Lauren MacMullan"
SELECT "production_code" FROM "table_14562722_1" WHERE "Lauren MacMullan" = "directed_by" AND "Michael Dante DiMartino" = "written_by"