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: WORLD HISTORY 
Clue: He completed vols. 2 & 3 of Karl Marx's "Das Kapital"

Answer: friedrich engels


Question: Category: SUBWAY STOPS 
Clue: You can ride one line in this world capital from Kifissia to Pireas

Answer: athens


Question: Category: AMERICAN LITERATURE 
Clue: Truman Capote's nonfiction novel "In Cold Blood" was written in an event that took place in this state

Answer:
kansas