Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: On November 22, 1986, which boxer became the youngest WBC Heavyweight champion, at age 20 years, 4 months, when he scored a TKO over Trevor Berbick in the second round?

Answer: boxing


Question: In 1959, for which film did David Niven win his only Academy Award?

Answer: david niven


Question: The Battle of Palmito Ranch (Hill) was the last major clash of which 19th century war?

Answer:
battle of palmito ranch