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 Q]: Context : Norway - Upgraded to NASAMS 2. 
Question : Which was the official year for the approval of NASAMS?
[EX A]: service entry

[EX Q]: Context : James Mitchell Varnum was born in Dracut, Massachusetts. 
Question : What military organization did James Mitchell Varnum belong to?
[EX A]: military branch

[EX Q]: Context : Raymond Rallier du Baty (30 August 1881 - 7 May 1978) was a French sailor and explorer, from Lorient in Brittany, who carried out surveys of the subantarctic Kerguelen Islands in the southern Indian Ocean in the early 20th century. 
Question : When did Raymond Rallier du Baty die?
[EX A]:
date of death