CREATE TABLE table_14562722_1 (production_code VARCHAR(255), written_by VARCHAR(255), directed_by VARCHAR(255))
What was the production code of the episode that was written by michael dante dimartino and directed by lauren macmullan?
    
SQL: SELECT production_code FROM table_14562722_1 WHERE written_by = "Michael Dante DiMartino" AND directed_by = "Lauren MacMullan"