CREATE TABLE artist (artist_id DECIMAL, artist TEXT, age DECIMAL, famous_title TEXT, famous_release_date TEXT)
CREATE TABLE volume (volume_id DECIMAL, volume_issue TEXT, issue_date TEXT, weeks_on_top DECIMAL, song TEXT, artist_id DECIMAL)
CREATE TABLE music_festival (id DECIMAL, music_festival TEXT, date_of_ceremony TEXT, category TEXT, volume DECIMAL, result TEXT)

What are the dates of ceremony at music festivals corresponding to volumes that lasted more than 2 weeks on top?
SELECT T1.date_of_ceremony FROM music_festival AS T1 JOIN volume AS T2 ON T1.volume = T2.volume_id WHERE T2.weeks_on_top > 2
SELECT "T1"."date_of_ceremony" FROM "music_festival" AS "T1" JOIN "volume" AS "T2" ON "T1"."volume" = "T2"."volume_id" AND "T2"."weeks_on_top" > 2