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 British city would you find Barlinnie prison?
Example Output: hm prison barlinnie

Example Input: Who was the CBS News anchor-man known as 'the man Americans most trust'?
Example Output: news presenter

Example Input: Who immediately succeeded Abraham Lincoln as President?
Example Output:
abraham lincoln