the category wankel engine is a group containing which engines?
Entity Entity Entity
m.0cvjx6n m.0cvjx7j m.0h3rv8y
Mazda 20B-REW Mazda 13B-REW MidWest AE series
class entity
engineering.engine m.08375
engineering.engine engineering.engine_category
Engine Wankel engine
none none
engineering.engine.category
Category
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 :engineering.engine . 
VALUES ?x1 { :m.08375 } 
?x0 :engineering.engine.category ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND engineering.engine (JOIN engineering.engine.category m.08375))