Show the famous titles of the artists with both volumes that lasted more than 2 weeks on top and volumes that lasted less than 2 weeks on top.
select t1.famous_title from artist as t1 join volume as t2 on t1.artist_id = t2.artist_id where t2.weeks_on_top > 2 intersect select t1.famous_title from artist as t1 join volume as t2 on t1.artist_id = t2.artist_id where t2.weeks_on_top < 2