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

Example Input: Which mediaeval author wrote The Canterbury Tales?
Example Output: the canterbury tales

Example Input: Who wrote the novel 'Brideshead Revisited'?
Example Output: brideshead revisited

Example Input: On which Mediterranean Island is the city of Ajaccio?
Example Output:
ajaccio