Question: What is the official website of the television station that originally broadcasted Roots (which has Laurence Fishburne as a cast member)?
Choices: http://www.chrisisaak.com/
http://www.europacorp.com/dossiers/taken/
http://www.history.com/
http://www.crawley.gov.uk/
https://www.olympic.org/salt-lake-city-2002
http://www.warrencountyva.net
http://www.miramax.com/movie/jersey-girl
http://www.rockhall.com/
http://www.michaelswanwick.com/
https://westmidlandscombinedauthority.org.uk
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "television station" . ?e_1 <original_network> ?e . ?e_1 <pred:name> "Roots" . ?e_1 <cast_member> ?e_2 . ?e_2 <pred:name> "Laurence Fishburne" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Laurence Fishburne
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Roots
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: original network
forward
function: FilterConcept
dependencies: 4
inputs: television station
function: QueryAttr
dependencies: 5
inputs: official website
Answer: http://www.history.com/