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:
a nature reserve (preserve or (national/nature) conserve) is a protected area.

Ex Output:
nature reserve


Ex Input:
sceaux-sur-huisne is a commune.

Ex Output:
sceaux-sur-huisne


Ex Input:
irving wayne hardin (march 23, 1926 – april 12, 2017) was an american football player and coach.

Ex Output:

wayne hardin


