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: In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?

Answer: achilles

Question: Lopburi, Phichit and Ang Thong are provinces in which Asian country?

Answer: phichit

Question: Which Sanskrit word appears as a concept in both Buddhism and Hinduism, etc., and means Law or Natural Law?

Answer:
hinduism