user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: which video game engine did victor luchits develop? 
Knowledge Triplets: Qfusion, cvg.computer_game_engine.engine_family, id Tech
Warsow, cvg.computer_videogame.gameplay_modes, Single-player video game
CodeRED: Alien Arena, cvg.computer_videogame.publisher, COR Entertainment
Warsow, cvg.game_version.game, Warsow
Warsow, cvg.computer_videogame.versions, Warsow
Quake III Arena, cvg.computer_videogame.influenced, Warsow
Victor Luchits, cvg.cvg_developer.games_developed, CodeRed: Battle for Earth
Victor Luchits, cvg.computer_game_engine_developer.computer_game_engines_developed, Qfusion
Victor Luchits, people.person.education, m.07yl903
Qfusion, cvg.computer_game_engine.predecessor_engine, id Tech 2
Victor Luchits, people.person.place_of_birth, Moscow
Victor Luchits, people.person.education, m.07yl90k
Warsow, cvg.computer_videogame.influenced_by, Unreal Tournament 2004
CodeRED: Alien Arena, base.wikipedia_infobox.video_game.platforms, Mac OS
m.03ph3vw, people.place_lived.person, Victor Luchits
Victor Luchits, people.person.places_lived, m.03ph3vw
CodeRED: Alien Arena, cvg.computer_videogame.gameplay_modes, Multiplayer video game
CodeRED: Alien Arena, cvg.computer_videogame.uses_game_engine, id Tech 2
Programmer, people.profession.people_with_this_profession, Victor Luchits
m.07yl903, education.education.student, Victor Luchits
Warsow, cvg.computer_videogame.versions, War§ow
CodeRED: Alien Arena, cvg.computer_videogame.gameplay_modes, Single-player video game
COR Entertainment, cvg.cvg_developer.games_developed, CodeRED: Alien Arena
Victor Luchits, cvg.cvg_developer.games_developed, CodeRED: Alien Arena
Unreal Tournament, cvg.computer_videogame.influenced, Warsow
Victor Luchits, people.person.gender, Male
CodeRED: Alien Arena, cvg.computer_videogame.cvg_genre, Action game
CodeRed: Battle for Earth, cvg.computer_videogame.developer, Victor Luchits
id Tech 2, cvg.computer_game_engine.successor_engine, Qfusion
War§ow, cvg.game_version.game, Warsow
CodeRED: Alien Arena, base.wikipedia_infobox.video_game.platforms, FreeBSD
Victor Luchits, people.person.education, m.07yl90_
m.07yl90k, education.education.student, Victor Luchits
m.07yl90_, education.education.student, Victor Luchits
Victor Luchits, people.person.nationality, Russia
Victor Luchits, cvg.computer_game_engine.developer, Qfusion
Warsow, cvg.computer_videogame.cvg_genre, First-person Shooter
id Tech 2, cvg.computer_game_engine.used_for_computer_games, CodeRED: Alien Arena
Warsow, cvg.computer_videogame.influenced_by, Quake
Warsow, cvg.computer_videogame.release_date, 2005-06-08
Quake, cvg.computer_videogame.influenced, Warsow
Warsow, cvg.computer_videogame.cvg_genre, Shooter game
Moscow, location.location.people_born_here, Victor Luchits
Victor Luchits, cvg.cvg_developer.games_developed, Warsow
Warsow, base.wikipedia_infobox.video_game.platforms, Microsoft Windows
CodeRED: Alien Arena, cvg.computer_videogame.versions, CodeRED: Alien Arena
Warsow, cvg.computer_videogame.cvg_genre, Action game
m.0tv4d8b, dataworld.gardening_hint.last_referenced_by, Victor Luchits
Warsow, cvg.computer_videogame.influenced_by, Quake III Arena
Warsow, cvg.computer_videogame.gameplay_modes, Multiplayer video game
CodeRED: Alien Arena, base.wikipedia_infobox.video_game.platforms, Microsoft Windows
Warsow, cvg.computer_videogame.uses_game_engine, Qfusion
Warsow, cvg.computer_videogame.influenced_by, Unreal Tournament 2003
Unreal Tournament 2003, cvg.computer_videogame.influenced, Warsow
Unreal Tournament 2004, cvg.computer_videogame.influenced, Warsow
CodeRED: Alien Arena, base.wikipedia_infobox.video_game.developer, COR Entertainment
CodeRED: Alien Arena, base.wikipedia_infobox.video_game.platforms, Linux
Qfusion, cvg.computer_game_engine.developer, Victor Luchits
CodeRED: Alien Arena, cvg.computer_videogame.developer, Victor Luchits
Warsow, cvg.computer_videogame.influenced_by, Quake II
Qfusion, cvg.computer_game_engine.used_for_computer_games, Warsow
Quake II, cvg.computer_videogame.influenced, Warsow
CodeRED: Alien Arena, cvg.computer_videogame.release_date, 2004-10
id Tech, cvg.computer_game_engine_family.engines_in_this_family, Qfusion
Warsow, cvg.computer_videogame.developer, Victor Luchits
Victor Luchits, people.person.profession, Programmer
CodeRED: Alien Arena, cvg.computer_videogame.developer, COR Entertainment
CodeRED: Alien Arena, cvg.computer_videogame.cvg_genre, First-person Shooter
CodeRED: Alien Arena, cvg.game_version.game, CodeRED: Alien Arena
Warsow, cvg.computer_videogame.influenced_by, Unreal Tournament

Answer: Qfusion