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_91 (series_sorted VARCHAR, released VARCHAR)
### Question:
What is the series sorted value for the episode released December 2009?
### Answer:
SELECT series_sorted FROM table_name_91 WHERE released = "december 2009"