Question: Which video game developer's official website is http://www.havok.com/?
Choices: Disney Interactive Studios
U.S. Gold
Gameloft
Atlus
Sonic Team
Havok
Valve Corporation
Atari
Eidos Interactive
HAL Laboratory
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.havok.com/" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: official website
http://www.havok.com/
function: FilterConcept
dependencies: 1
inputs: video game developer
function: What
dependencies: 2
Answer: Havok