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: Written by Edgar Allen Poe and published in 1845, what poem repeats the famous line `nevermore`?
Example Output: edgar allan poe

Example Input: Who played Dr Who in the 1965 film Dr Who and the Daleks?
Example Output:
dr. who and the daleks