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.

Input: Consider Input: the features of a production vehicle or production car are mass-produced identical models, offered for sale to the public.

Output: production vehicle


Input: Consider Input: rougefay is a commune.

Output: rougefay


Input: Consider Input: the volkswagen golf mk6 is the sixth generation of the compact car volkswagen golf.


Output: volkswagen golf mk6