Question: How many different production codes does the episode directed by Dominic Polcino have?
SQL: SELECT COUNT("Production code") FROM "1-20613292-1" WHERE "Directed by" = 'Dominic Polcino';

Question: What's the production code of the episode written by Kirker Butler and directed by Dan Povenmire?
SQL: SELECT "Production code" FROM "1-20613292-1" WHERE "Written by" = 'Kirker Butler' AND "Directed by" = 'Dan Povenmire';