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.

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

Example Input: Category: CLEANING UP 
Clue: In 1898 Caleb Johnson sold this soap named for 2 types of oil used to make it; later the co. merged with Colgate
Example Output: palmolive

Example Input: Category: WEATHER 
Clue: To produce rain, clouds are often seeded with crystals of this compound, formula Agl
Example Output:
silver iodide