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

What are the issue dates of volumes associated with the artist aged 23 or younger?
SELECT issue_date FROM artist AS T1 JOIN volume AS T2 ON T1.artist_id = T2.artist_id WHERE T1.age <= 23
SELECT "issue_date" FROM "artist" "T1" JOIN "volume" "T2" ON "T1"."artist_id" = "T2"."artist_id" WHERE "T1"."age" <= 23