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.

Context : An article in a Romanian newspaper in the 1950s acknowledged the death of the last direct male descendant of Radu Mihnea Voda, Dumitru Radulescu(Radu)- a church, artist painter. 
Question : What is the gender of Radu Mihnea?
sex or gender

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?
spouse

Context : After World War II up until the fifties, Ernst-Wilhelm Reinert pursued a career in business. 
Question : What organization was Ernst-Wilhelm Reinert involved with?

military branch