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 : Knights of Xentar is a humorous JRPG eroge (meaning it has erotic content). 
Question : To which series does Knights of Xentar belong?

Ex Output:
series


Ex Input:
Context : Blackadder Goes Forth is the fourth and final series of the BBC sitcom Blackadder, written by Richard Curtis and Ben Elton, which aired from 28 September to 2 November 1989 on BBC One. 
Question : Where can you find the show Blackadder Goes Forth?

Ex Output:
original network


Ex Input:
Context : GSD&M is an advertising agency headquartered in Austin, Texas, United States. 
Question : What is GSD&M's parent company?

Ex Output:

parent company