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: THE WORDS OF MARTIN LUTHER KING 
Clue: This 1954 "decision...will long be stenciled on the mental sheets of succeeding generations"

Answer: brown v. board of education


Question: Category: FORBES' RICHEST PEOPLE 
Clue: Worth $53.5 billion, Carlos Slim, owner of Telmex, became the first person from this country to top the Forbes list

Answer: mexico


Question: Category: WORLD HISTORY 
Clue: In the 5th century B.C., this Greek historian wrote that it took 100,000 men 20 years to complete the Great Pyramid

Answer:
herodotus