สำนักงานตุ๊กไหนมีเขต 29?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Which Took Office has a District of 29?It is not neccessary to use all the tables.
 table_name_8:  (took_office [ INTEGER ] district [ VARCHAR) ]
SELECT AVG(took_office) FROM table_name_8 WHERE district = 29