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: gauchin-verloingt is a commune.
Example Output: gauchin-verloingt

Example Input: adam lambert (born january 29, 1982 in indianapolis, indiana) is an american pop rock singer-songwriter.
Example Output: adam lambert

Example Input: the boeing international headquarters (colloquially known as the boeing building and formerly known as the morton international building) is a 36-floor skyscraper located in the near west side of chicago.
Example Output:
boeing international headquarters