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 : ``I Saw What I Saw'' is the sixth episode of the sixth season of the American television medical drama Grey's Anatomy, and the show's 108th episode overall. 
Question : What series is I Saw What I Saw from?

Ex Output:
series


Ex Input:
Context : In 1935, Duncan Sandys married Diana Churchill, daughter of the future prime minister Winston Churchill. 
Question : What is Duncan Sandys's spouse's name?

Ex Output:
spouse


Ex Input:
Context : Chorus Gentlemen is a Canadian music television series which aired on CBC Television from 1965 to 1967. 
Question : On what channel did Chorus Gentlemen first appear?

Ex Output:

original network