Question: What is the official website for the film that mainly depicts Indigenous peoples of the United States?
Choices: https://web.archive.org/web/20090202050724/http://alexander-thegame.com/us/
http://www.hbo.com/films/burymyheart/
http://www.uwyo.edu
http://www.sonypictures.com/movies/lordsofdogtown/index-b.html
http://iamandreamartin.com
http://www.sbu.edu
http://www.curtis.edu
http://www.emmys.com/
http://www.iceage3.co.uk/
http://www.alleganyco.com
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "film" . ?e <main_subject> ?e_1 . ?e_1 <pred:name> "Indigenous peoples of the United States" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Indigenous peoples of the United States
function: Relate
dependencies: 0
inputs: main subject
backward
function: FilterConcept
dependencies: 1
inputs: film
function: QueryAttr
dependencies: 2
inputs: official website
Answer: http://www.hbo.com/films/burymyheart/