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

Example Input: Trujillo and Chiclayo are cities in which country in the Americas?
Example Output: chiclayo

Example Input: Which alliteratively-named politician served as Abraham Lincoln's Vice-President between 1861 and 1865?
Example Output: abraham lincoln

Example Input: Which actress is the mother of actress Carrie Fisher?
Example Output:
carrie fisher