List all the name of the customers that received a shipment in February 2017.
shipment in February 2017 refers to ship_date LIKE '2017-02-%'; name of customer refers to cust_name
SELECT T1.cust_name FROM customer AS T1 INNER JOIN shipment AS T2 ON T1.cust_id = T2.cust_id WHERE T2.ship_date LIKE '2017-02%'