instruction:
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.
question:
Category: TEENS IN BOOKS 
Clue: This 15-year-old Dutch skater is the title character of a classic book by Mary Mapes Dodge
answer:
hans brinker


question:
Category: LITERATURE 
Clue: Poet who wrote, "Before I built a wall I'd ask to know what I was walling in or walling out"
answer:
robert frost


question:
Category: MYTHOLOGICAL SIBLINGS 
Clue: Zeus rewarded these twin brothers by placing them in the stars as Gemini
answer:

castor & pollux