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.
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Question: 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?

Answer: based on


Question: Context : LOT Charters launched flight operations on 1 June 2009. 
Question : What is LOT Charters's parent company?

Answer: parent company


Question: Context : HD 126271 is a suspected variable star in the northern constellation of Boötes. 
Question : What constellation is HD 126271 in?

Answer:
constellation