Who wrote the episode that aired on April 17, 2011? 
CREATE TABLE table_11111116_6 (written_by VARCHAR, original_air_date VARCHAR)
SELECT written_by FROM table_11111116_6 WHERE original_air_date = "April 17, 2011"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_11111116_6 (written_by VARCHAR, original_air_date VARCHAR) Question: Who wrote the episode that aired on April 17, 2011?  [/INST] SELECT written_by FROM table_11111116_6 WHERE original_air_date = "April 17, 2011" </s>