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

Example Input: Who won a Gold Medal for Britain in the men's 100 metres at the 1992 Summer Olympic Games in Barcelona?
Example Output: britain

Example Input: What was the name of Chuck Berry's 1972 hit which gave him his first number one?
Example Output: chuck berry

Example Input: What is the title of the first BBC television series to be sold to the Soviet Union?
Example Output:
bbc