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: waiting for guffman is a musical mockumentary movie made in 1997.
Example Output: waiting for guffman

Example Input: the embassy of russia in copenhagen is the embassy of russia to denmark.
Example Output: embassy of russia in copenhagen

Example Input: coruscant is a fictional planet in the "star wars" movies.
Example Output:
coruscant