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: klaus ebner (born august 8, 1964) is an austrian writer of short stories, essays and poetry, and a translator.
Example Output: klaus ebner

Example Input: altoids are a brand of breath mints and candies that have been sold since the 1800s.
Example Output: altoids

Example Input: the wwe united states championship is a professional wrestling championship in world wrestling entertainment (wwe).
Example Output:
wwe united states championship