สัญชาติใดมีลม* ไม่มี?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Which Nationality has a Wind* of n/a?It is not neccessary to use all the tables.
 table_13122:  "Mark" [ text]  "Wind*" [ text]  "Athlete" [ text]  "Nationality" [ text]  "Venue" [ text]  "Date" [ text] 
SELECT "Nationality" FROM table_13122 WHERE "Wind*" = 'n/a'