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: 'Highway 61 Revisited' and 'Blood On The Tracks' were both albums released by which popular singer?

Answer: highway 61 revisited


Question: In which constellation is the star Deneb?

Answer: deneb


Question: What is the upper house of the British Parliament?

Answer:
parliament of the united kingdom