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 Input:
Context : Eric Gascoigne Robinson was born in 1882 at Greenwich in South-East London to John Lovell Robinson and Louisa Aveline Gascoigne. 
Question : What military organization did Eric Gascoigne Robinson belong to?

Ex Output:
military branch


Ex Input:
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?

Ex Output:
point in time


Ex Input:
Context : (A rumor at that time -- later claimed to be true by Wang Yanhan's adoptive brother Wang Yanbing -- was that Wang Shenzhi was poisoned by Wang Yanhan's wife Lady Cui, but it cannot be known whether the rumor was true.) 
Question : What is Wang Yanhan's spouse's name?

Ex Output:

spouse