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 : ``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?

Ex Output:
series


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 : Shiira used WebKit for rendering and scripting. 
Question : Which is the basis of Shiira?

Ex Output:

based on