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.

Input: Consider Input: 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?

Output: conflict


Input: Consider Input: Context : Christian de Boissieu received a Ph. D in economics in 1973 at the University of Paris-I Panthéon-Sorbonne. 
Question : What is the name university that educated Christian de Boissieu?

Output: educated at


Input: Consider Input: Context : Brett McLean (born August 14, 1978) is a Canadian professional ice hockey centre currently playing for EHC Black Wings Linz in the Austrian Hockey League (EBEL). 
Question : Player Brett McLean played for which team?


Output: drafted by