what are the ratings in the office of film and literature classification video game rating system?
Entity Entity Entity Entity Entity Entity Entity Entity
m.0j2hf5y m.0j2hf91 m.0j2hf2y m.0j2hf32 m.0j2hf4d m.0j2hf4n m.0j2hf4v m.0j2hf70
R16 Objectionable G PG M R13 R15 R18
class entity
cvg.computer_game_rating m.042nvv
cvg.computer_game_rating cvg.computer_game_rating_system
Video Game Rating office of film and literature classification
none none
cvg.computer_game_rating.rating_system
Rating system
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 :cvg.computer_game_rating . 
VALUES ?x1 { :m.042nvv } 
?x0 :cvg.computer_game_rating.rating_system ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND cvg.computer_game_rating (JOIN cvg.computer_game_rating.rating_system m.042nvv))