Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

[EX Q]: Three of the Galilean moons of Jupiter are Io, Europa and Callisto. Which is the fourth?
[EX A]: ganymede

[EX Q]: What type of opera is Puccini's Gianni Schicchi?
[EX A]: comedy

[EX Q]: Who wrote Farewell to Arms and The Sun Also Rises?
[EX A]:
ernest hemingway