how many artists recorded the contribution by lso?
Value
6
class class class entity
music.featured_artist music.recording music.track_contribution m.014hr0
music.featured_artist music.recording music.track_contribution music.orchestra
Featured artist Musical Recording Recording contribution lso
count none none none
music.recording.featured_artists music.track_contribution.track music.artist.track_contributions
Featured artists Recording Recording contributions
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.featured_artist . 
?x1 :type.object.type :music.recording . 
?x2 :type.object.type :music.track_contribution . 
VALUES ?x3 { :m.014hr0 } 
?x1 :music.recording.featured_artists ?x0 . 
?x2 :music.track_contribution.track ?x1 . 
?x3 :music.artist.track_contributions ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(COUNT (AND music.featured_artist (JOIN (R music.recording.featured_artists) (JOIN (R music.track_contribution.track) (JOIN (R music.artist.track_contributions) m.014hr0)))))