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: "little red corvette" is a pop/rock song by musician prince.
Example Output: little red corvette

Example Input: margaret colin (born may 26, 1958) is an american actress.
Example Output: margaret colin

Example Input: scotland yard is the headquarters of the metropolitan police in london.
Example Output:
scotland yard