Question: How is Regina, which uses the operating system iOS, related to the GNU General Public License?
Choices: award received
professorship
affiliation
practiced by
sexual orientation
subsidiary
production designer
statistical leader
head coach
license
SPARQL: SELECT DISTINCT ?p WHERE { ?e_1 <pred:name> "Regina" . ?e_1 <operating_system> ?e_3 . ?e_3 <pred:name> "iOS" . ?e_2 <pred:name> "GNU General Public License" . ?e_1 ?p ?e_2 .  }
Program:
function: Find
inputs: iOS
function: Relate
dependencies: 0
inputs: operating system
backward
function: Find
inputs: Regina
function: And
dependencies: 1
2
function: Find
inputs: GNU General Public License
function: QueryRelation
dependencies: 3
4
Answer: license