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: Who was the father of Edward the Elder, the Anglo-Saxon King from 899 to 924?

Answer: edward the elder


Question: Which American city has baseball-playing 'Dodgers'?

Answer: los angeles dodgers


Question: In which European country is Lake Bolsena?

Answer:
bolsena