What was the production code of the episode written by Brendan Cowell?
CREATE TABLE table_25390694_2 (production_code VARCHAR, writer VARCHAR)
SELECT production_code FROM table_25390694_2 WHERE writer = "Brendan Cowell"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_25390694_2 (production_code VARCHAR, writer VARCHAR) Question: What was the production code of the episode written by Brendan Cowell? [/INST] SELECT production_code FROM table_25390694_2 WHERE writer = "Brendan Cowell" </s>