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 Q]: Category: ISLANDS 
Clue: 3,414-foot-high Carrantuohill west of Killarney is the highest peak on this island
[EX A]: ireland

[EX Q]: Category: VINCENT 
Clue: With Curt Gentry, he wrote "Helter Skelter: The True Story of the Manson Murders"
[EX A]: vincent bugliosi

[EX Q]: Category: GOING DUTCH 
Clue: In 1656 Dutch scientist Christiaan Huygens made the first pendulum type of this device
[EX A]:
a clock