Find the titles of albums that contain tracks of both the Reggae and Rock genres.
select t1.title from album as t1 join track as t2 on t1.albumid = t2.albumid join genre as t3 on t2.genreid = t3.genreid where t3.name = 'Reggae' intersect select t1.title from album as t1 join track as t2 on t1.albumid = t2.albumid join genre as t3 on t2.genreid = t3.genreid where t3.name = 'Rock'