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 : HD 13931 is an 8th magnitude G-type star located approximately 144 light years away in the constellation Andromeda. 
Question : What constellation is HD 13931 a part of?

Ex Output:
constellation


Ex Input:
Context : The FNAB-43 is an Italian designed and developed submachinegun manufactured from 1943 to 1944. 
Question : What year was the service entry date for FNAB-43?

Ex Output:

service entry