Question: Which developer of video games is associated with the official site online at http://www.koei.co.jp?
Choices: Data East
EA Vancouver
Eidos Interactive
Konami
Atari
Interplay Entertainment
Disney Interactive Studios
Sonic Team
Epic Games
Koei
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "video game developer" . ?e <official_website> ?pv . ?pv <pred:value> "http://www.koei.co.jp" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: official website
http://www.koei.co.jp
function: FilterConcept
dependencies: 1
inputs: video game developer
function: What
dependencies: 2
Answer: Koei