เหรียญทองแดงประเภทกรีฑาคือวันไหน?ไม่จำเป็นต้องใช้ทุกโต๊ะ
what is the date when the medal is bronze for athletics?It is not neccessary to use all the tables.
 table_name_26:  (date [ INTEGER ] sport [ VARCHAR ] medal [ VARCHAR) ]
SELECT AVG(date) FROM table_name_26 WHERE sport = "athletics" AND medal = "bronze"