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 : Le Corsaire is a ballet typically presented in three acts, with a libretto originally created by Jules-Henri Vernoy de Saint-Georges loosely based on the poem The Corsair by Lord Byron. 
Question : The Le Corsaire is based upon what?

Ex Output:
based on


Ex Input:
Context : Salt Water Tabby was scored by Scott Bradley, produced by Fred Quimby, and directed and written by William Hanna and Joseph Barbera. 
Question : What is the series called that Salt Water Tabby belongs to?

Ex Output:
series


Ex Input:
Context : William Osler was born in Bond Head, Canada West (now Ontario) on July 12, 1849, and raised after 1857 in Dundas, Ontario. 
Question : What kind of  occupation does William Osler have?

Ex Output:

occupation