Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.

[EX Q]: Context : The latest version has GTK+ support and a native Carbon port for Mac OS X. XEmacs has always had a very open development-environment, including anonymous CVS, later Mercurial access and publicly accessible development mailing-lists. 
Question : The XEmacs is based upon what?
[EX A]: based on

[EX Q]: Context : Chorus Gentlemen is a Canadian music television series which aired on CBC Television from 1965 to 1967. 
Question : On what channel did Chorus Gentlemen first appear?
[EX A]: original network

[EX Q]: Context : The weapon still fires 5.45×39mm ammunition from 30-round magazines at an approximate rate of fire of 600 to 650 rounds per minute, the barrel length remains the same and the muzzle brake has been retained, which suggests that the Vepr's ballistic performance should be identical to that of the AK-74. 
Question : What year is Vepr associated with?
[EX A]:
service entry