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_37 (car_numbers VARCHAR, first_used VARCHAR)
### Question:
Which Car numbers have a First used of currently on order?
### Answer:
SELECT car_numbers FROM table_name_37 WHERE first_used = "currently on order"