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

Ex Input:
What is the capital city of Colombia?

Ex Output:
colombia


Ex Input:
Which jockey rode Red Alligator to victory in the 1968 Grand National?

Ex Output:
red alligator


Ex Input:
Sirius otherwise known as the Dog Star can be found in which constellation?

Ex Output:

sirius