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: HISTORIC EUROPEAN LEADERS 
Clue: On June 15, 1961 Walter Ulbricht assured journalists that "No one intends to build a wall" dividing this city
Example Output: berlin

Example Input: Category: SCOTLAND 
Clue: In March 1328, in the Treaty of Northampton, the English finally recognized him as King of the Scots
Example Output: robert the bruce

Example Input: Category: CHEMISTRY 
Clue: Boyle's Law says the volume of a gas increases as this decreases if its temperature stays constant
Example Output:
its pressure