Question: What is the Stack Exchange tag for video?
Choices:
https://travel.stackexchange.com/tags/india
https://reverseengineering.stackexchange.com/tags/windows
https://serverfault.com/tags/windows
https://stackoverflow.com/tags/video
https://ja.stackoverflow.com/tags/perl
https://gamedev.stackexchange.com/tags/c%2b%2b
https://opendata.stackexchange.com/tags/asia
https://stackoverflow.com/tags/c%2B%2B
https://stackoverflow.com/tags/php-5.5
https://tex.stackexchange.com/tags/windows
Answer: https://stackoverflow.com/tags/video
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "video" . ?e <Stack_Exchange_tag> ?pv .  }
Program:
function: Find
inputs: video
function: QueryAttr
dependencies: 0
inputs: Stack Exchange tag