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.

Example Input: Context : ``Peter's Daughter'' is the seventh episode of the sixth season of Family Guy and originally aired November 25, 2007. 
Question : To which series does Peter's Daughter belong?
Example Output: series

Example Input: Context : Her mother later married actor John Southall, by whom she had a daughter, Georganne Southall, Cher's half-sister. 
Question : What is Cher's spouse's name?
Example Output: spouse

Example Input: Context : The T-28 tank was officially approved on 11 August 1933. 
Question : What year was T-28 commissioned?
Example Output:
service entry