ลิฟต์ของ Giacomo Colonna คือใคร?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
Who was the Elevator of Giacomo Colonna?It is not neccessary to use all the tables.
 table_name_21:  (elevator [ VARCHAR ] elector [ VARCHAR) ]
SELECT elevator FROM table_name_21 WHERE elector = "giacomo colonna"