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: "D" IN SCIENCE 
Clue: Sharks first inhabited the waters during this period of the Paleozoic era named for an English county
answer:
devonian


question:
Category: ACTRESSES IN HISTORY 
Clue: She was born Emilie Charlotte Le Breton on the island of Jersey in 1853
answer:
lillie langtry


question:
Category: OF THE NILE 
Clue: The first of the 10 Biblical plagues of Egypt occurred when the waters of the Nile were turned into this
answer:

blood