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 shipments (order_id VARCHAR, shipment_date INTEGER)
### Question:
Find the id of the order which is shipped most recently.
### Answer:
SELECT order_id FROM shipments WHERE shipment_date = (SELECT MAX(shipment_date) FROM shipments)