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 : Wolf-Dietrich Wilcke (11 March 1913 -- 23 March 1944) was a German Luftwaffe pilot during World War II, a fighter ace credited with 162 enemy aircraft shot down in 732 combat missions. 
Question : Which war did Wolf-Dietrich Wilcke serve in?

Answer: conflict


Question: Context : Maa Exchange is a Hindi language Indian reality television series which premiered on January 12, 2011 on Sony TV. 
Question : What production company or companies created Maa Exchange?

Answer: production company


Question: Context : Charles Foster Kane is a fictional character and the subject of Orson Welles' 1941 film Citizen Kane. 
Question : The Charles Foster Kane is based upon what?

Answer:
based on