which musical instrument is in a musical contribution associated with basso buffo?
Entity Entity Entity Entity
m.042v_gx m.0c0n9v9 m.05h6wb m.09k5j9
Acoustic guitar Backing Vocals Bass pedals NS/Stick
class class entity
music.instrument music.recording_contribution m.037c9s
music.instrument music.recording_contribution music.voice
Musical instrument Musical Contribution basso buffo
none none none
music.performance_role.guest_performances music.recording_contribution.performance_role
Guest Performances Role
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 (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :music.instrument . 
?x1 :type.object.type :music.recording_contribution . 
VALUES ?x2 { :m.037c9s } 
?x0 :music.performance_role.guest_performances ?x1 . 
?x1 :music.recording_contribution.performance_role ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND music.instrument (JOIN music.performance_role.guest_performances (JOIN music.recording_contribution.performance_role m.037c9s)))