Milepost ของ Twin Tunnel #1 North คืออะไร?ไม่จำเป็นต้องใช้ทุกโต๊ะ
What is the Milepost of the Twin Tunnel #1 North?It is not neccessary to use all the tables.
 table_name_74:  (milepost [ VARCHAR ] name_of_the_tunnel [ VARCHAR) ]
SELECT COUNT(milepost) FROM table_name_74 WHERE name_of_the_tunnel = "twin tunnel #1 north"