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

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" "T1" JOIN "volume" "T2" ON "T1"."volume" = "T2"."volume_id" AND "T2"."weeks_on_top" > 2