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 : Antonio Reali was born on 31 March 1891 in Ozegna, the Kingdom of Italy. 
Question : In what war did Antonio Reali fight in?
Example Output: conflict

Example Input: Context : For decades only Episode 3 of The Enemy of the World was known to have survived erasure, but the five missing episodes were announced as recovered by the BBC on 11 October 2013 along with four of the missing episodes of the following serial, The Web of Fear. 
Question : To which series does The Enemy of the World belong?
Example Output: series

Example Input: Context : George Roupell died in Shalford, Surrey, on 4 March 1974 (aged 82). 
Question : Which armed forces utilised the service of George Roupell?
Example Output:
military branch