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: the new aspiration party ("phak khwam wang mai ") is a political party in thailand.
Example Output: new aspiration party

Example Input: jeong mong-ju (, hanja:鄭夢周, 1337 - april 1392) was a korean goryo dynasty politician, writer, poet and thinker.
Example Output: jeong mong-ju

Example Input: an eponym is a person's name that is used to name something else.
Example Output:
eponym