Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: Which American city has baseball-playing 'Dodgers'?

Answer: los angeles dodgers


Question: Who plays Isobel Crawley in the UK television series 'Downton Abbey'?

Answer: downton abbey


Question: Which American boxer was born Rocco Francis Marchegiano?

Answer:
boxing