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:
love's labour's lost is a comedy play by william shakespeare which was written between 1588 and 1597.

Ex Output:
love's labour's lost


Ex Input:
all the money in the world is a 2017 british-american historical crime drama movie directed by ridley scott and written by david scarpa.

Ex Output:

all the money in the world