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:
zirconium is a chemical elemental metal.

Ex Output:
zirconium


Ex Input:
jennifer warnes is an american singer.

Ex Output:
jennifer warnes


Ex Input:
mariangela melato (september 19, 1941 – january 11, 2013) was an italian actress who was known for her roles in "swept away", "the seduction of mimi", "love and anarchy", "the working class goes to heaven", and in "policewomen".

Ex Output:

mariangela melato