instruction:
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.
question:
Context : The exceptionally well-preserved parchment used for 4Q41 is quite small compared to other Qumran scrolls. 
Question : What is the series called that 4Q41 belongs to?
answer:
series


question:
Context : Anna Magdalena Bach (née Wilcke or Wilcken) (22 September 1701 -- 22 February 1760) was an accomplished singer and the second wife of Johann Sebastian Bach. 
Question : What is Anna Magdalena Bach's spouse's name?
answer:
spouse


question:
Context : The AK-63 (also known in Hungarian military service as the AMM) is a Hungarian variant of the AKM assault rifle manufactured by the Fegyver- és Gépgyár (FÉG) state arms plant in Hungary. 
Question : What year was the service entry date for AK-63?
answer:

service entry