ใครคือคน 4 เลนจากแคนาดา?ไม่จำเป็นต้องใช้ทุกโต๊ะ
Who was the 4 lane person from Canada?It is not neccessary to use all the tables.
 table_name_9:  heat [ INTEGER]  lane [ VARCHAR]  nationality [ VARCHAR] 
SELECT MIN(heat) FROM table_name_9 WHERE lane = 4 AND nationality = "canada"