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 : Narcissus in Chains is the tenth book in the Anita Blake: 
Question : What is the series that Narcissus in Chains is a part of?

Answer: series


Question: Context : Dishonored Lady is a 1947 American crime drama film directed by Robert Stevenson and starring Hedy Lamarr, Dennis O'Keefe, and John Loder. 
Question : The Dishonored Lady is based upon what?

Answer:
based on