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 (region VARCHAR, date VARCHAR, format VARCHAR)
### Question:
What's the region for an item on November 10, 2007 that's a cd?
### Answer:
SELECT region FROM table_name_91 WHERE date = "november 10, 2007" AND format = "cd"