Give the name of the driver of shipment no.1021.
shipment no. 1021 refers to ship_id = 1021; name refers to first_name, last_name
SELECT T2.first_name, T2.last_name FROM shipment AS T1 INNER JOIN driver AS T2 ON T1.driver_id = T2.driver_id WHERE T1.ship_id = '1021'