prior to id tech which video game engine was created before this one?
Entity Entity Entity Entity Entity Entity
m.078j6_ m.06fbdb m.061xjs m.02rpzlg m.0gt6vr m.04j2b3
id Tech 4 id Tech 2 id Tech 3 id Tech 5 Qfusion Quake engine
class class entity
cvg.computer_game_engine cvg.computer_game_engine m.02rq8_0
cvg.computer_game_engine cvg.computer_game_engine cvg.computer_game_engine_family
Video Game Engine Video Game Engine id Tech
none none none
cvg.computer_game_engine.predecessor_engine cvg.computer_game_engine_family.engines_in_this_family
Predecessor Engine Engines in This 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 (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :cvg.computer_game_engine . 
?x1 :type.object.type :cvg.computer_game_engine . 
VALUES ?x2 { :m.02rq8_0 } 
?x0 :cvg.computer_game_engine.predecessor_engine ?x1 . 
?x2 :cvg.computer_game_engine_family.engines_in_this_family ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND cvg.computer_game_engine (JOIN cvg.computer_game_engine.predecessor_engine (JOIN (R cvg.computer_game_engine_family.engines_in_this_family) m.02rq8_0)))