Question: What is the Stack Exchange tag of the functional programming language whose subreddit is haskell?
Choices: https://stackoverflow.com/tags/windows-7
https://unix.stackexchange.com/tags/historical-unix
https://opendata.stackexchange.com/tags/europe
https://stackoverflow.com/tags/haskell
https://stackoverflow.com/tags/geography
https://politics.stackexchange.com/tags/donald-trump
https://security.stackexchange.com/tags/windows
https://devops.stackexchange.com/tags/windows
https://stackoverflow.com/tags/php4
https://android.stackexchange.com/tags/windows
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "functional programming" . ?e <subreddit> ?pv_1 . ?pv_1 <pred:value> "haskell" . ?e <Stack_Exchange_tag> ?pv .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: subreddit
haskell
function: FilterConcept
dependencies: 1
inputs: functional programming
function: QueryAttr
dependencies: 2
inputs: Stack Exchange tag
Answer: https://stackoverflow.com/tags/haskell