ฤดูกาลใดที่มี UFL Cup tbd?ไม่จำเป็นต้องใช้ทุกโต๊ะ
Which Season has a UFL Cup of tbd?It is not neccessary to use all the tables.
 table_name_52:  (season [ VARCHAR ] ufl_cup [ VARCHAR) ]
SELECT season FROM table_name_52 WHERE ufl_cup = "tbd"