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: BODIES OF WATER 
Clue: This sea that extends about 1,200 miles was referred to in ancient times as the Erythraean Sea
Example Output: the red sea

Example Input: Category: ASIAN HISTORY 
Clue: This peninsula of 85,000 square miles was ruled by a single dynasty from 1392 to 1910
Example Output: korea

Example Input: Category: THE 20th CENTURY 
Clue: To allow people to communicate more quickly, on May 15, 1918, courtesy of the U.S. Army, this service began
Example Output:
air mail