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: regent's canal is a canal in england.
Example Output: regent's canal

Example Input: james b. dudley high school in the town of greensboro, north carolina, where the agricultural and technical university is located, was named after dudley because of his work for his community.
Example Output: james b. dudley

Example Input: philippe, chevalier de lorraine
Example Output:
chevalier de lorraine