tv y is used by which tv rating system?
Entity
m.06zttrv
TV Parental Guidelines
class entity
tv.tv_rating_system m.030p0dr
tv.tv_rating_system tv.tv_rating
TV Rating System TV Y
none none
tv.tv_rating_system.tv_ratings
TV Ratings
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 :tv.tv_rating_system . 
VALUES ?x1 { :m.030p0dr } 
?x0 :tv.tv_rating_system.tv_ratings ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND tv.tv_rating_system (JOIN tv.tv_rating_system.tv_ratings m.030p0dr))