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.
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Question: Category: LAW ENFORCEMENT 
Clue: This police force developed from bands of Indian fighters who protected American settlers in Mexico

Answer: the texas rangers


Question: Category: ART 
Clue: The Italian name of this 15th century masterpiece is "L'Ultima Cena"

Answer: \"the last supper\"


Question: Category: 19th CENTURY SPEECHES 
Clue: At Harvard, this writer proposed that we work 1 day & leave 6 free for the "sublime revelations of nature"

Answer:
henry david thoreau