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_69 (works_no VARCHAR, class VARCHAR, year VARCHAR)
### Question:
Which works number has a class of 15th and year of 1940?
### Answer:
SELECT works_no FROM table_name_69 WHERE class = "15th" AND year = "1940"