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

Example Input: Which model was married to photographer David Bailey for 10 years, from 1975?
Example Output: david bailey

Example Input: What was Casanova's occupation at the time of is death?
Example Output: giacomo casanova

Example Input: Which of Agatha Christie's novels was the first to feature Miss Marple?
Example Output:
christie