locate tube trumpet's variations.
Entity
m.07gql
Trumpet
class entity
music.instrument m.0gl6p6
music.instrument music.instrument
Musical instrument Tube trumpet
none none
music.instrument.variation
Variations
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 . 
VALUES ?x1 { :m.0gl6p6 } 
?x0 :music.instrument.variation ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND music.instrument (JOIN music.instrument.variation m.0gl6p6))