Question: Which website represents the TV movie first broadcast by PBS?
Choices: http://michaelstipe.com/
http://www.pbs.org/wgbh/americanexperience/films/walt-disney/video/
http://www.co.mclean.il.us
http://www.sonypictures.com/homevideo/thedavincicode
http://www.acadiau.ca
http://www.houstontexans.com/
http://www.lowellma.gov/Pages/Home.aspx
http://www.ulm.de
http://www.coleporter.org/
http://www.miramax.com/movie/the-diving-bell-and-the-butterfly
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "television film" . ?e <original_network> ?e_1 . ?e_1 <pred:name> "PBS" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: PBS
function: Relate
dependencies: 0
inputs: original network
backward
function: FilterConcept
dependencies: 1
inputs: television film
function: QueryAttr
dependencies: 2
inputs: official website
Answer: http://www.pbs.org/wgbh/americanexperience/films/walt-disney/video/