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

Example Input: In which city was Christopher Columbus born?
Example Output: columbus

Example Input: 'Arthur Clennam', 'Jeremiah Flintwinch', and 'Edward Sparkler' are all characters in which Dickens' novel?
Example Output: arthur clennam

Example Input: Eamon de Valera founded which political party in 1926?
Example Output:
eamon de valera