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

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

Example Input: In which war did the Sack of Badajoz takeplace?
Example Output: siege of badajoz

Example Input: Aside from the Netherlands and Belgium what is the only country in which Dutch is an official language?
Example Output:
dutch