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:
the gates of the forest is a book written by nobel peace prize-winning author elie wiesel.

Ex Output:
the gates of the forest


Ex Input:
the karlal (urdu کرڑال also known as kard'al, karaal, karhral, or kiraal) is a hindko speaking tribe in khyber-pakhtunkhwa, pakistan.

Ex Output:
karlal


Ex Input:
the quillota province is one of eight provinces of the central chilean region of valparaíso (v).

Ex Output:

quillota province