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: TRINIDADIAN AMATEUR ICHTHYOLOGISTS 
Clue: This common aquarium fish was named for a Trinidadian clergyman
answer:
guppy


question:
Category: U.S. CITIES 
Clue: Its largest airport is named for a World War II hero; its second largest, for a World War II battle
answer:
chicago


question:
Category: SILENT MOVIES 
Clue: A special 1996 comic book put Superman in the world of this classic 1926 German film
answer:

metropolis