which engine contains sub-categories that is the category of walter mikron?
Entity
m.03tpm
Internal combustion engine
class class entity
engineering.engine_category engineering.engine_category m.02qdyj5
engineering.engine_category engineering.engine_category engineering.engine
Engine category Engine category Walter Mikron
none none none
engineering.engine_category.sub_categories engineering.engine.category
Sub-categories 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_category . 
?x1 :type.object.type :engineering.engine_category . 
VALUES ?x2 { :m.02qdyj5 } 
?x0 :engineering.engine_category.sub_categories ?x1 . 
?x2 :engineering.engine.category ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND engineering.engine_category (JOIN engineering.engine_category.sub_categories (JOIN (R engineering.engine.category) m.02qdyj5)))