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

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

Ex Output:
aconcagua


Ex Input:
What is the alcoholic ingredient of a Screwdriver cocktail?

Ex Output:
screwdriver


Ex Input:
As President of Congress, whose signature dominates the Declaration of Independence?

Ex Output:

united states declaration of independence