Question: What is the official website for Walt Disney (the one whose distributor is PBS)?
Choices:
http://www.viewaskew.com/chasingamy
http://www.roger-waters.com/
http://www.augustaga.gov
http://www.therunawayjurymovie.com
http://www.pbs.org/wgbh/americanexperience/films/walt-disney/video/
http://iamandreamartin.com
https://www.themillers.co.uk/
http://www.longestyard.com/longestyard.php/
http://www.stlawu.edu
http://www.cbs.com/shows/limitless/
Program:
function: Find
inputs: PBS
function: Relate
dependencies: 0
inputs: distributor
backward
function: Find
inputs: Walt Disney
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: official website
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Walt Disney" . ?e <distributor> ?e_1 . ?e_1 <pred:name> "PBS" .  ?e <official_website> ?pv .  }
Answer: http://www.pbs.org/wgbh/americanexperience/films/walt-disney/video/