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.

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

Ex Output:
jeong mong-ju


Ex Input:
danilo alvim (3 december 1920 – 16 may 1996) is a former brazilian football player.

Ex Output:
danilo alvim


Ex Input:
bosnian wikipedia is the bosnian language edition of wikipedia.

Ex Output:

bosnian wikipedia