what is the total number of engines for rpg maker?
Value
5
class entity
cvg.computer_game_engine m.0gn0qj
cvg.computer_game_engine cvg.computer_game_engine_family
Video Game Engine RPG Maker
count none
cvg.computer_game_engine.engine_family
Engine Family
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_engine . 
VALUES ?x1 { :m.0gn0qj } 
?x0 :cvg.computer_game_engine.engine_family ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND cvg.computer_game_engine (JOIN cvg.computer_game_engine.engine_family m.0gn0qj)))