who are the writers of the episode whose production code is 176206? 
CREATE TABLE table_2866509_1 (written_by VARCHAR, production_code VARCHAR)
SELECT written_by FROM table_2866509_1 WHERE production_code = 176206
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2866509_1 (written_by VARCHAR, production_code VARCHAR) Question: who are the writers of the episode whose production code is 176206?  [/INST] SELECT written_by FROM table_2866509_1 WHERE production_code = 176206 </s>