You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

[Q]: Category: STATIONERY 
Clue: The card seen here is designed for use with this name brand
[A]: rolodex


[Q]: Category: FICTIONAL CHARACTERS 
Clue: Lassiter is the gun-slinging hero of this Zane Grey novel & appears in its sequel "The Rainbow Trail"
[A]: "riders of the purple sage"


[Q]: Category: SEOUL TRAIN 
Clue: Seoul is about 20 miles from this "colorful" sea
[A]:
the yellow sea