Question: What is the official website for the feature film that has Chow Yun-fat as a cast member?
Choices: http://www.droylsdenfc.com/
http://www.alleganyco.com
http://www.haywiremovie.com
http://www.jetli.com/index.php?l=en
http://pirates.disney.com/pirates-of-the-caribbean-at-worlds-end
http://www.meandorsonwellesthemovie.com/
http://www.ccc.govt.nz/
http://www.ayrunitedfc.co.uk/
http://www.fbihvlada.gov.ba/
http://www.arlesavignon.net
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "feature film" . ?e <cast_member> ?e_1 . ?e_1 <pred:name> "Chow Yun-fat" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Chow Yun-fat
function: Relate
dependencies: 0
inputs: cast member
backward
function: FilterConcept
dependencies: 1
inputs: feature film
function: QueryAttr
dependencies: 2
inputs: official website
Answer: http://pirates.disney.com/pirates-of-the-caribbean-at-worlds-end