how many game expansions has valve corp released?
Value
3
class entity
cvg.computer_game_expansion m.0dwl2
cvg.computer_game_expansion cvg.cvg_publisher
Video Game Expansion valve corp
count none
cvg.cvg_publisher.games_published
Games Published
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 (COUNT(?x0) AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :cvg.computer_game_expansion . 
VALUES ?x1 { :m.0dwl2 } 
?x1 :cvg.cvg_publisher.games_published ?x0 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND cvg.computer_game_expansion (JOIN (R cvg.cvg_publisher.games_published) m.0dwl2)))