Question: What proprietary software uses the Croatian language?
Choices: Microsoft Windows
Orange
macOS
Brave
iOS
Unix
Android
Solaris
Linux
Regina
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "proprietary software" . ?e <language_of_work_or_name> ?e_1 . ?e_1 <pred:name> "Croatian" .   }
Program:
function: Find
inputs: Croatian
function: Relate
dependencies: 0
inputs: language of work or name
backward
function: FilterConcept
dependencies: 1
inputs: proprietary software
function: What
dependencies: 2
Answer: macOS