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.

Ex Input:
Category: HISTORIC ISLANDS
Clue: A 900-year-old organization expelled in 1798 was allowed to return to this island in 1998

Ex Output:
malta

Ex Input:
Category: LANDMARKS
Clue: In the 1879 Mathew Brady photo seen here, this structure was about 150 feet tall

Ex Output:
washington monument

Ex 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

Ex Output:
air mail