Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: Who won the men`s gold medal for ice-figure skating at the 1980 Winter Olympics?

Answer: 1980 winter olympics


Question: Who composed Air on the G String?

Answer: air on the g string


Question: The 02 Arena is in which London borough?

Answer:
the o2 arena