How many episodes were written by Jack Burditt & Robert Carlock
CREATE TABLE table_15938543_1 (production_code VARCHAR, written_by VARCHAR)
SELECT COUNT(production_code) FROM table_15938543_1 WHERE written_by = "Jack Burditt & Robert Carlock"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15938543_1 (production_code VARCHAR, written_by VARCHAR) Question: How many episodes were written by Jack Burditt & Robert Carlock [/INST] SELECT COUNT(production_code) FROM table_15938543_1 WHERE written_by = "Jack Burditt & Robert Carlock" </s>