Question: What is the official website for a liberal arts college in the US that employs John Irving (the one that is educated at University of Pittsburgh) ?
Choices: http://www.mtholyoke.edu
https://www.qantas.com
http://www.clubdevo.com/
http://www.tonyawards.com/
http://www.auf.org.uy
http://research.microsoft.com/en-us/um/people/gbell/Digital/timeline/tmlnhome.htm
https://www.davidbowie.com/
http://www.shirazcity.org
http://www.sho.com/homeland
http://www.multiverse.org
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "liberal arts college in the United States" . ?e_1 <employer> ?e . ?e_1 <pred:name> "John Irving" . ?e_1 <educated_at> ?e_2 . ?e_2 <pred:name> "University of Pittsburgh" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: University of Pittsburgh
function: Relate
dependencies: 0
inputs: educated at
backward
function: Find
inputs: John Irving
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: employer
forward
function: FilterConcept
dependencies: 4
inputs: liberal arts college in the United States
function: QueryAttr
dependencies: 5
inputs: official website
Answer: http://www.mtholyoke.edu