ปีที่ 7 เหรียญทองได้ไปกี่เหรียญ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
How many silver medals were won the year 7 gold medals were won?It is not neccessary to use all the tables.
 table_name_43:  silver [ VARCHAR]  gold [ VARCHAR] 
SELECT silver FROM table_name_43 WHERE gold = "7"