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: 19th CENTURY AMERICA 
Clue: In 1875 this Republican was elected governor of Ohio; 17 months later, he took the oath of office as president

Answer: hayes


Question: Category: "TRIPLE" JEOPARDY! 
Clue: Collective term for victories in horse racing's 3 major events

Answer: triple crown


Question: Category: AIRCRAFT OF WORLD WAR I 
Clue: Germany's Halberstadt CL IV was powered by this engine brand named for a girl

Answer:
mercedes