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

Example Input: Category: FAMOUS FOLKS 
Clue: During WWII this Geodesic Dome inventor headed mechanical engineering for the Board of Economic Warfare
Example Output: buckminster fuller

Example Input: Category: THE NET WORKS 
Clue: In its first 2 months, this site was available for students at only 4 colleges, including Harvard
Example Output:
facebook