Question: What is the official website for the written work that derives from Carrie (the one whose release region is Spain)?
Choices: http://english.daegu.go.kr/
http://www.cook-islands.gov.ck/
http://www.dreddthemovie.com
http://disney.go.com/disneypictures/princeofpersia
http://www.georgeclinton.com/
http://www.cityoffullerton.com
http://www.appelezmoidave-lefilm.com/
http://pages.simonandschuster.com/perksofbeingawallflower
http://www.moqawama.org/
http://stephenking.com/library/novel/carrie.html
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "written work" . ?e <derivative_work> ?e_1 . ?e_1 <pred:name> "Carrie" . ?e_1 <film_release_region> ?e_2 . ?e_2 <pred:name> "Spain" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Spain
function: Relate
dependencies: 0
inputs: film release region
backward
function: Find
inputs: Carrie
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: derivative work
backward
function: FilterConcept
dependencies: 4
inputs: written work
function: QueryAttr
dependencies: 5
inputs: official website
Answer: http://stephenking.com/library/novel/carrie.html