Question: Which physics engine with Stack Exchange tag stackoverflow.com/tags/havok is officially represented by the site www.havok.com?
Choices: University of Calgary
German-Soviet War
Todd Field
Havok
Jonathan Lynn
Love Affair
John Logan
Steve Zahn
Ron W. Miller
Pacific Palisades
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "physics engine" . ?e <Stack_Exchange_tag> ?pv . ?pv <pred:value> "https://stackoverflow.com/tags/havok" . ?e <official_website> ?pv_1 . ?pv_1 <pred:value> "http://www.havok.com/" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Stack Exchange tag
https://stackoverflow.com/tags/havok
function: FilterConcept
dependencies: 1
inputs: physics engine
function: FindAll
function: FilterStr
dependencies: 3
inputs: official website
http://www.havok.com/
function: FilterConcept
dependencies: 4
inputs: physics engine
function: And
dependencies: 2
5
function: What
dependencies: 6
Answer: Havok