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_72 (shipyard VARCHAR, laid_down VARCHAR)
### Question:
Which shipyard has a fleet that was laid down on April 21, 1962?
### Answer:
SELECT shipyard FROM table_name_72 WHERE laid_down = "april 21, 1962"