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 : For decades only Episode 3 of The Enemy of the World was known to have survived erasure, but the five missing episodes were announced as recovered by the BBC on 11 October 2013 along with four of the missing episodes of the following serial, The Web of Fear. 
Question : To which series does The Enemy of the World belong?
[A]: series


[Q]: Context : Huo Cui (Chinese: 霍翠; pinyin: Huò Cuì; born September 13, 1988 in Harbin, Heilongjiang) is a Chinese female ice hockey player. 
Question : What is the sex or gender of Huo Cui?
[A]: sex or gender


[Q]: Context : General Sir Francis Seymour, 1st Baronet, GCB (2 August 1813, Lisburn, County Down -- 10 July 1890, Kensington Palace, London) was a British Army officer and courtier. 
Question : What was the military branch for Sir Francis Seymour, 1st Baronet?
[A]:
military branch