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 : Turkish Airlines Flight 1951 (also known as the Poldercrash) was a passenger flight that crashed during landing at the Amsterdam Schiphol Airport, Netherlands, on 25 February 2009, resulting in the death of nine passengers and crew including all three pilots. 
Question : On what date did Turkish Airlines Flight 1951 occur?
[EX A]: point in time

[EX Q]: Context : Sons of Anarchy is an American crime drama television series created by Kurt Sutter. 
Question : What was the original network for Sons of Anarchy?
[EX A]: original network

[EX Q]: Context : Designated MA-31 in US service, the first launch of the missile took place in August 1996. 
Question : In what year did MA-31 enter service?
[EX A]:
service entry