which musical voice was sung by claudio strüby?
Entity
m.0j862
Tenor
class entity
music.voice m.0t_jpfj
music.voice music.group_member
Musical voice Claudio Strüby
none none
music.voice.singers
Singers
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.voice . 
VALUES ?x1 { :m.0t_jpfj } 
?x0 :music.voice.singers ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND music.voice (JOIN music.voice.singers m.0t_jpfj))