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_13 (date VARCHAR, director VARCHAR)
### Question:
When was the film directed by Pen-Ek Ratanaruang released?
### Answer:
SELECT date FROM table_name_13 WHERE director = "pen-ek ratanaruang"