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: What did Edwin Land invent because of his daughters' wish for instant and 'snappy' results?

Answer: edwin h. land


Question: What's the name of Doctor Who's home planet ?

Answer: doctor who


Question: What was the secret identity of the comic book character Babs Gordon?

Answer:
barbara gordon