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 : NGC 147 is a member of the Local group of galaxies and a satellite galaxy of the Andromeda Galaxy (M31). 
Question : The star NGC 147 is a part of the constellation named what?
[EX A]: constellation

[EX 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?
[EX A]: point in time

[EX Q]: Context : Chan Hao-ching (born September 19, 1993), also named Angel Chan, is a professional tennis player representing Chinese Taipei. 
Question : What city is Chan Hao-ching associated with?
[EX A]:
residence