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 : Teacher Didn't Tell Me is a British television series which aired on the BBC during 1957. 
Question : What production company or companies created Teacher Didn't Tell Me?
[EX A]: production company

[EX Q]: Context : The C14 Timberwolf MRSWS (Medium Range Sniper Weapon System) is a bolt-action sniper rifle built by the Canadian arms company PGW Defence Technologies Inc. In 2005 they won the contract to supply the Canadian Forces Land Command with the C14 Timberwolf MRSWS for $4.5 million. 
Question : What was the year that C14 Timberwolf entered service?
[EX A]: service entry

[EX Q]: Context : Russell Willson and his wife, as well as Russell Willson, Jr., are buried together in the United States Naval Academy Cemetery in Annapolis, Maryland. 
Question : Which military did Russell Willson serve with?
[EX A]:
military branch