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. PRESIDENTS 
Clue: The first man to receive a million votes for president in one election, he didn't get to enjoy the victory for long

Answer: william henry harrison


Question: Category: THE 20th CENTURY 
Clue: In 1916, his assassins included a prince and a grand duke

Answer: rasputin


Question: Category: HISTORICAL PHRASES 
Clue: Before it meant a space between opposing armies, it referred to an execution site outside the walls of London

Answer:
no man\'s land