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 african golden cat ("profelis aurata") is a medium-sized cat.

Ex Output:
african golden cat


Ex Input:
teleportation is the supposed movement of matter from one point to another without travelling across the physical space between them.

Ex Output:
teleportation


Ex Input:
a gunshot is the discharge of a firearm.

Ex Output:

gunshot