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: Basil Rathbone made 14 Sherlock Holmes films. Who played the part of Dr Watson?

Answer: watson


Question: Which jockey rode Red Alligator to victory in the 1968 Grand National?

Answer: red alligator


Question: What is the name of the major Greek stadium in Athens that was the venue for the opening and closing ceremonies, athletics events and the football (soccer) final at the 2004 Summer Olympics?

Answer:
athens