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: eric s. raymond (often called esr; born 4 december 1957) is an american writer and computer programmer.
Example Output: eric s. raymond

Example Input: le theil-en-auge is a commune.
Example Output: le theil-en-auge

Example Input: the japan society for the promotion of science (日本学術振興会, "nihon gakujutsu shinkō kai") (jsps), also known as "gakushin", is an independent administrative institution in japan.
Example Output:
japan society for the promotion of science