featured by sierra leone describes how many musical albums?
Value
2
class entity
music.album m.01v7bp9
music.album music.featured_artist
Musical Album Sierra Leone
count none
music.album.featured_artists
Featured artists
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (COUNT(?x0) AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :music.album . 
VALUES ?x1 { :m.01v7bp9 } 
?x0 :music.album.featured_artists ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND music.album (JOIN music.album.featured_artists m.01v7bp9)))