ทองคำใดมีคะแนนรวม 721? ไม่จำเป็นต้องใช้ตารางทั้งหมด
Which Gold has a Total of 721?It is not neccessary to use all the tables.
 table_13214:  "Rank" [ text]  "Nation" [ text]  "Gold" [ real]  "Silver" [ real]  "Bronze" [ real]  "Total" [ real] 
SELECT AVG("Gold") FROM table_13214 WHERE "Total" = '721'