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 country are the Angel Falls, or Kerepakupai Ven?
Example Output: angel falls

Example Input: In which city could you visit the Anne Frank House?
Example Output: anne frank house

Example Input: October 21, 1833 saw the birth of what Swedish chemist, engineer, and inventor, responsible for creating dynamite?
Example Output:
dynamite