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 consistency, answers should be in all lower cased letters.

Input: Consider Input: Category: E BEFORE I 
Clue: Hold your horses! & to make it easier, use these straps that attach to the bit of the bridle

Output: reins


Input: Consider Input: Category: LETHAL WEAPONS 
Clue: In the largest man-made explosion in history, the USSR detonated a 50-megaton one of these in 1961

Output: a hydrogen bomb


Input: Consider Input: Category: TALL STRUCTURES 
Clue: On July 21, 2007 the Burj Dubai surpassed this nation's Taipei 101 to become the world's tallest building


Output: taiwan