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.

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

Context : Wolfgang Kretzschmar (2 July 1907 -- 27 December 1944) was a German officer serving during World War II and recipient of the coveted Knight's Cross of the Iron Cross with Oak Leaves and Swords (German: Ritterkreuz des Eisernen Kreuzes mit Eichenlaub und Schwertern). 
Question : In which war did Wolfgang Kretzschmar serve?
conflict

Context : Friedrich von Löwis of Menar (Germanized name; Russian: Фёдор Фёдорович Левиз / Fedor Fedorovich Leviz) (6 September 1767, Haapsalu - 16 April 1824) was a Russian lieutenant general of the Napoleonic Wars. 
Question : What war or battle did Friedrich von Löwis of Menar fight in?

conflict