TASK DEFINITION: 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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: INVESTING WITH WARREN BUFFETT 
Clue: Buffett calls the purchase of this insurance company one of his best investments; he first bought its stock in 1951

SOLUTION: geico

PROBLEM: Category: 10-LETTER NAMES 
Clue: Roman myths called Hades' wife Proserpina, while the Greeks knew her by this name

SOLUTION: persephone

PROBLEM: Category: FAIRIES & WEE FOLK 
Clue: Resembling trolls, trows live in these Scottish islands famous for their small ponies

SOLUTION:
shetland islands