album artist(s) sales
album
artist -lrb- s -rrb-
sales
number
number
number text text number
1 vain elamaa various artists 164119
what album is listed before 21 ?
WDT NN VBD-AUX VBN IN CD .
Chillaa
select c2 from w where id = ( select id from w where c2 = '21' ) - 1