What's the production code of the episode written by Kirker Butler and directed by Dan Povenmire?
CREATE TABLE table_20613292_1 (production_code VARCHAR, written_by VARCHAR, directed_by VARCHAR)
SELECT production_code FROM table_20613292_1 WHERE written_by = "Kirker Butler" AND directed_by = "Dan Povenmire"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_20613292_1 (production_code VARCHAR, written_by VARCHAR, directed_by VARCHAR) Question: What's the production code of the episode written by Kirker Butler and directed by Dan Povenmire? [/INST] SELECT production_code FROM table_20613292_1 WHERE written_by = "Kirker Butler" AND directed_by = "Dan Povenmire" </s>