Task: Text to Code
Input (English): Step 1: For each row in volume table, find the corresponding rows in music_festival table.
Step 2: find Volume of the results of step 1 with largest value of Weeks_on_Top
Output (English): SELECT T2.Volume FROM volume AS T1 JOIN music_festival AS T2 ON T1.Volume_ID = T2.Volume ORDER BY T1.Weeks_on_Top Desc LIMIT 1