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.

Example Input: grand-corent is a commune.
Example Output: grand-corent

Example Input: a commode is a special piece of furniture.
Example Output: commode

Example Input: the temple of athena nike is a temple on the acropolis of athens.
Example Output:
temple of athena nike