What is the series sorted value for the episode released December 2009?
CREATE TABLE table_name_91 (
    series_sorted VARCHAR,
    released VARCHAR
)
SELECT series_sorted FROM table_name_91 WHERE released = "december 2009"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the series sorted value for the episode released December 2009? ### Input: CREATE TABLE table_name_91 (
    series_sorted VARCHAR,
    released VARCHAR
) ### Response: SELECT series_sorted FROM table_name_91 WHERE released = "december 2009"