CREATE TABLE table_13997 ("Medal" CLOB, "Name" CLOB, "Sport" CLOB, "Event" CLOB, "Date" FLOAT)

what is the date when the medal is bronze for athletics?
SELECT AVG("Date") FROM table_13997 WHERE "Sport" = 'athletics' AND "Medal" = 'bronze'
SELECT AVG("Date") FROM "table_13997" WHERE "Medal" = 'bronze' AND "Sport" = 'athletics'