Question: What is the official license for the free software copyleft license, the license of Java by Oracle Corporation?
Choices: http://www.zipporah.com/films/43
http://www.pittsfield-ma.org/
https://www.fck.dk/
http://www.co.klamath.or.us
http://www.gov.bb/
https://www.cecilbdemille.com
https://www.warnerbros.com/hangover
http://www.cantonohio.gov/
https://www.gnu.org/licenses/gpl.html
http://www.uga.edu
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> "Java" . ?e_1 <developer> ?e_2 . ?e_2 <pred:name> "Oracle Corporation" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Oracle Corporation
function: Relate
dependencies: 0
inputs: developer
backward
function: Find
inputs: Java
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: license
forward
function: FilterConcept
dependencies: 4
inputs: free software copyleft license
function: QueryAttr
dependencies: 5
inputs: official website
Answer: https://www.gnu.org/licenses/gpl.html