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_name_38 (premiere VARCHAR, rating VARCHAR)
### Question:
What was the date of the premiere that had a 20.9 rating?
### Answer:
SELECT premiere FROM table_name_38 WHERE rating = "20.9"