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:
in organic chemistry, an epoxide is a molecule that has a ring with at least three atoms in total, two carbon atoms and one oxygen atom.

Ex Output:
epoxide

Ex Input:
cape hatteras is a cape on the coast of north carolina.

Ex Output:
cape hatteras

Ex Input:
a scholarship is financial help (money) given to someone who wants to study.

Ex Output:
scholarship