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.

Q: Context : Herbert Lumsden was born in the United Kingdom at Clanfield, Oxfordshire, England on 8 April 1897, the son of John Lumsden. 
Question : What military branch was Herbert Lumsden associated with?

A: military branch
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Q: Context : Virtually all battles that are considered part of the 'Battle of the Border' (with the exception of the Battle of Hel, which lasted for more than a month and the Battle of Mokra, a Polish defensive victory) resulted in rapid defeat of Polish forces, which were forced to abandon the regions of Pomerania, Greater Poland and Silesia. 
Question : When did Battle of the Border occur?

A: point in time
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Q: Context : The King's Troop, Royal Horse Artillery was prior to the visit of King George VI on 24 October 1947 named The Riding Troop, Royal Horse Artillery. 
Question : With which military branch did King's Troop, Royal Horse Artillery serve with?

A:
military branch
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