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.

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


[Q]: Which Norwegian band had a hit with `Manhattan Skyline`?
[A]: a-ha


[Q]: Where did Billy Clanton and the brothers Tom and Frank MacLaury famously die on October 26, 1881?
[A]:
gunfight at the o.k. corral