Who wrote episode number 18?
CREATE TABLE table_28196105_1 (written_by VARCHAR, _number VARCHAR)
SELECT written_by FROM table_28196105_1 WHERE _number = 18
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28196105_1 (written_by VARCHAR, _number VARCHAR) Question: Who wrote episode number 18? [/INST] SELECT written_by FROM table_28196105_1 WHERE _number = 18 </s>