Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Which country mainly makes up the Horn of Africa?
africa

Charlie Chaplin who died on Christmas Day in 1977, co founded which film studio along with Mary Pickford, Douglas Fairbanks?
douglas fairbanks

At the 2008 Beijing Olympics, who became the first British man to win three gold medals at one Games since 1908?

2008 summer olympics