user: Question: What was the production code of the episode that was written by Michael Dante DiMartino and directed by Lauren MacMullan?
Columns: ['No. in series', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [0.0, '"Unaired Pilot"', 'Dave Filoni', 'Michael Dante DiMartino & Bryan Konietzko', 'Unaired', 100.0]
SQL:

assistant: SELECT "Production code" FROM "Table" WHERE "Written by" = 'Michael Dante DiMartino' AND "Directed by" = 'Lauren MacMullan';