Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Ex Input:
a dipole speaker is a type of a loudspeaker.

Ex Output:
dipole speaker


Ex Input:
the capital of hunedoara county is deva.

Ex Output:
hunedoara county


Ex Input:
the british association for applied linguistics (baal) is an academic society.

Ex Output:

british association for applied linguistics