Question: What is the official website for the United States city whose subreddit is Alton?
Choices: http://lahore.gop.pk/
http://www.ststephens.edu
http://www.woj-pomorskie.pl
http://www.nba.com/pacers/
https://www.olympic.org/rome-1960
http://www.alton-il.com
http://www.johnbarrowman.com
http://www.kirkdouglas.com/
https://www.delta.com/
https://www.android.com
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city of the United States" . ?e <subreddit> ?pv_1 . ?pv_1 <pred:value> "Alton" . ?e <official_website> ?pv .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: subreddit
Alton
function: FilterConcept
dependencies: 1
inputs: city of the United States
function: QueryAttr
dependencies: 2
inputs: official website
Answer: http://www.alton-il.com