TASK DEFINITION: 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.
PROBLEM: 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?

SOLUTION: based on

PROBLEM: Context : Rocky Barton (July 28, 1956 -- July 12, 2006) was executed by the State of Ohio on July 12, 2006 for the murder of his wife, 43-year-old Kimbirli Jo Barton, at their home in Waynesville, Ohio. 
Question : For what crime was Rocky Barton prosecuted?

SOLUTION: convicted of

PROBLEM: Context : Udny Yule was educated at Winchester College and at the age of 16 at University College London where he read engineering. 
Question : What university did Udny Yule attend?

SOLUTION:
educated at