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:
rougefay is a commune.

Ex Output:
rougefay


Ex Input:
gossliwil is a former municipality in the district bucheggberg, in the canton of solothurn, switzerland.

Ex Output:
gossliwil


Ex Input:
lethal weapon 3 is a 1992 comedy-action movie.

Ex Output:

lethal weapon 3