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.

Example Input: Context : Henry A. Thompson (1841 -- February 16, 1889) was a U.S. Marine stationed aboard the USS Minnesota during the American Civil War. 
Question : What war did Henry A. Thompson participate in?
Example Output: conflict

Example Input: Context : The BMP-3 is designed and produced by the Kurganmashzavod (``Kurgan Machine Building Plant'') some variants however are built by the Rubtsovsk Machine Building Plant (RMZ), for example the BRM-3K. 
Question : What year was BMP-3 introduced?
Example Output: service entry

Example Input: Context : Guru Angad married Mata Khivi in January 1520 and had two sons (Dasu and Datu) and two daughters (Amro and Anokhi). 
Question : What is Guru Angad's spouse's name?
Example Output:
spouse