Please list the departure airports of the flights on 2018/8/1 that were delayed.
departure airports refers ORIGIN; on 2018/8/1 refers to FL_DATE = '2018/8/1'; delayed refers to DEP_DELAY > 0;
SELECT T1.Description FROM Airports AS T1 INNER JOIN Airlines AS T2 ON T1.Code = T2.ORIGIN WHERE T2.FL_DATE = '2018/8/1' AND T2.DEP_DELAY > 0 GROUP BY T1.Description