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.

Input: Consider Input: Category: WHAT SHOULD I "DU"? 
Clue: A philosophical system that seeks to explain all phenomena in terms of 2 distinct principles

Output: dualism


Input: Consider Input: Category: MYTHOLOGY BOOKS & AUTHORS 
Clue: In the 6th century B.C., Greeks used his "Iliad" & "Odyssey" as textbooks

Output: homer


Input: Consider Input: Category: PROMINENT 20th CENTURY WOMEN 
Clue: The entries in her diary were addressed to "Kitty"


Output: anne frank