which video game expansions exist on the ps1?
Entity
m.0p3r2rm
The Elder Scrolls V: Skyrim – Dragonborn
class class entity
cvg.computer_game_expansion cvg.cvg_platform m.04d3gbs
cvg.computer_game_expansion cvg.cvg_platform cvg.cvg_platform_family
Video Game Expansion Video Game Platform PS1
none none none
cvg.computer_videogame.platforms cvg.cvg_platform_family.platforms
Platforms Platforms
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_expansion . 
?x1 :type.object.type :cvg.cvg_platform . 
VALUES ?x2 { :m.04d3gbs } 
?x0 :cvg.computer_videogame.platforms ?x1 . 
?x2 :cvg.cvg_platform_family.platforms ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND cvg.computer_game_expansion (JOIN cvg.computer_videogame.platforms (JOIN (R cvg.cvg_platform_family.platforms) m.04d3gbs)))