What was the original air date of the episode written by Michelle Offen?
CREATE TABLE table_19517621_4 (original_airdate VARCHAR, written_by VARCHAR)
SELECT original_airdate FROM table_19517621_4 WHERE written_by = "Michelle Offen"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_19517621_4 (original_airdate VARCHAR, written_by VARCHAR) Question: What was the original air date of the episode written by Michelle Offen? [/INST] SELECT original_airdate FROM table_19517621_4 WHERE written_by = "Michelle Offen" </s>