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_15 (format VARCHAR, label VARCHAR, catalog VARCHAR, date VARCHAR)
### Question:
What is the format for the album under the label, luaka bop, that had a catalog number of 3645 and dated after 1981?
### Answer:
SELECT format FROM table_name_15 WHERE catalog = "3645" AND date > 1981 AND label = "luaka bop"