the genre of campfire stories has how many musical artists?
Value
889
class class entity
music.artist music.genre m.011xcykw
music.artist music.genre music.recording
Musical Artist Musical genre Campfire Stories
count none none
music.genre.artists music.genre.recordings
Artists Recordings
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.artist . 
?x1 :type.object.type :music.genre . 
VALUES ?x2 { :m.011xcykw } 
?x1 :music.genre.artists ?x0 . 
?x1 :music.genre.recordings ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(COUNT (AND music.artist (JOIN (R music.genre.artists) (JOIN music.genre.recordings m.011xcykw))))