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.

Ex Input:
Context : Ernesto Ambrosini (29 September 1894 -- 4 November 1951) was an Italian athlete who competed mainly in the 3000 metres steeplechase. 
Question : The death of Ernesto Ambrosini occured on what date?

Ex Output:
date of death


Ex Input:
Context : William MacCormac was born in Belfast, Northern Ireland, the son of Dr Henry MacCormac, a notable Northern Irish physician, and his wife Mary MacCormac (née Newsam), the daughter of a prominent Anglo-Irish family. 
Question : The year William MacCormac died was what?

Ex Output:
date of death


Ex Input:
Context : Starstreak is a British short range Man-portable air-defense system (MANPADS) manufactured by Thales Air Defence (formerly Shorts Missile Systems), in Belfast. 
Question : In what year did Starstreak enter service?

Ex Output:

service entry