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 : Ian Boothby is married to Y The Last Man co-creator and artist Pia Guerra. 
Question : What is Ian Boothby's spouse's name?

Ex Output:
spouse


Ex Input:
Context : Eyes Wide Shut is a 1999 erotic thriller film based on Arthur Schnitzler's 1926 novella Traumnovelle (Dream Story) transferred from early 20th century Vienna to 1990s New York. 
Question : The Eyes Wide Shut is based upon what?

Ex Output:
based on


Ex Input:
Context : The Stoner 63, also known as the M63, XM22, XM23, XM207 or the Mk 23 Mod 0 machine gun, is an American modular weapons system designed by Eugene Stoner in the early 1960s. 
Question : In what year did Stoner 63 enter service?

Ex Output:

service entry