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: THEY EAT THAT? 
Clue: A food stand by London's Petticoat Lane is called, & serves, "Jellied" this elongated fish
answer:
eel


question:
Category: THE FICTIONAL LAND OF OZ 
Clue: This paving material of the road to the Emerald City is in need of repairs
answer:
yellow brick


question:
Category: FAMOUS NAMES 
Clue: Once a top spy, he invented the mug shot seen on reward posters in the Wild West
answer:

allan pinkerton