Question: What is the short name of the free software copyleft license which is the license of Linux?
Choices: GNU GPL
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SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "free software copyleft license" . ?e_1 <license> ?e . ?e_1 <pred:name> "Linux" .  ?e <short_name> ?pv .  }
Program:
function: Find
inputs: Linux
function: Relate
dependencies: 0
inputs: license
forward
function: FilterConcept
dependencies: 1
inputs: free software copyleft license
function: QueryAttr
dependencies: 2
inputs: short name
Answer: GNU GPL