Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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?
### Answer:
SELECT original_airdate FROM table_19517621_4 WHERE written_by = "Michelle Offen"