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

Example Input: Who was the father of Edward the Elder, the Anglo-Saxon King from 899 to 924?
Example Output: edward the elder

Example Input: Which biologist was known as Darwin's Bulldog?
Example Output: charles darwin

Example Input: In the Bible who was the father of Joseph and Benjamin?
Example Output:
joseph