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: U.S. GEOGRAPHY 
Clue: In 1937 the government set aside this Georgia swamp as a national wildlife refuge

Answer: okefenokee swamp


Question: Category: HISTORIC EUROPEAN LEADERS 
Clue: On June 15, 1961 Walter Ulbricht assured journalists that "No one intends to build a wall" dividing this city

Answer: berlin


Question: Category: CAN I BUY YOU A SANDWCH? 
Clue: A chopped olive salad tops the layers of meat & cheese in this specialty sandwich of New Orleans

Answer:
a muffuletta