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 : Filmed primarily in Canada with a Canadian director (Ted Kotcheff), Switching Channels features many popular Canadian character actors in supporting roles: 
Question : The Switching Channels is based upon what?

Answer: based on


Question: Context : Princess Helena of Nassau (German: Prinzessin Helene Wilhelmine Henriette Pauline Marianne von Nassau-Weilburg; 18 August 1831 -- 27 October 1888) was a daughter of William, Duke of Nassau (that is, the German state or region referred to as Nassau), and consort of George Victor, Prince of Waldeck and Pyrmont. 
Question : What is Princess Helena of Nassau's spouse's name?

Answer: spouse


Question: Context : Reinhard Graubner (2 August 1915 -- 3 November 1986) was a highly decorated Major in the Luftwaffe during World War II, and a recipient of the Knight's Cross of the Iron Cross. 
Question : Which conflict was Reinhard Graubner a part of?

Answer:
conflict