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

Input: Consider Input: Who composed Air on the G String?

Output: air on the g string

Input: Consider Input: In which range of mountains are the two highest peaks Aconcagua and Ojos Del Salado?

Output: aconcagua

Input: Consider Input: Who was Caesar stabbed first by in the Shakespeare play?
Output: julius caesar