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.
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Question: Category: EPITAPHS 
Clue: "Truth and history.  21 men.  The boy bandit king -- he died as he had lived"

Answer: billy the kid


Question: Category: AMERICAN EXPLORERS 
Clue: After being led there by a local, Hiram Bingham claimed he "discovered" this lost Incan city in Peru

Answer: machu picchu


Question: Category: HERE COMES COLLEGE 
Clue: From the Latin for "half-yearly", these divisions of a college's academic year can be 15 to 18 weeks long

Answer:
semesters