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 : Niourk (published 1957) is a science fiction novel by the French writer Stefan Wul. 
Question : Which place is Niourk in?
answer:
narrative location


question:
Context : Devil with a Plaid Skirt is the 4th episode of season one of the television sitcom Grounded for Life. 
Question : Which series is Devil with a Plaid Skirt a part of?
answer:
series


question:
Context : The Ross Mk.II (or ``model 1905'') rifle was highly successful in target shooting before WWI, but the close chamber tolerances, lack of primary extraction and overall length made the Mk.III (or ``1910'') Ross rifle unsuitable for the conditions of trench warfare and the often poor quality ammunition issued. 
Question : What year was the service entry date for Ross rifle?
answer:

service entry