Question: I want to know the Unix-like operating system that have BSD licenses as their license.
Choices: Linux
Windows XP
FreeBSD
Windows 7
Mac OS
macOS
Brave
Android
iOS
Unix
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "Unix-like operating system" . ?e <license> ?e_1 . ?e_1 <pred:name> "BSD licenses" .   }
Program:
function: Find
inputs: BSD licenses
function: Relate
dependencies: 0
inputs: license
backward
function: FilterConcept
dependencies: 1
inputs: Unix-like operating system
function: What
dependencies: 2
Answer: FreeBSD