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

Ex Input:
Which country mainly makes up the Horn of Africa?

Ex Output:
africa


Ex Input:
Name Alfred Hitchcock's first sound film as director?

Ex Output:
alfred hitchcock


Ex Input:
Which airline bought both BMI and Alitalia in 2008?

Ex Output:

bmi