Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: Who was the only boxer to win a world title without ever having a manager?

Answer: boxing


Question: Who won the 2011 Booker Prize for 'The Sense of an Ending'?

Answer: the sense of an ending


Question: Who played Gene Hunt in the TV series Life on Mars and Ashes to Ashes?

Answer:
ashes to ashes