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

Example Input: Which `brothers` had a number one hit in May 1958 with `All I Have To Do Is Dream`?
Example Output: all i have to do is dream

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: In Greek mythology, who was the beautiful youth loved by Aphrodite?
Example Output:
aphrodite