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.

[Q]: nelsan ellis (november 30, 1977 – july 8, 2017) was an american actor and playwright.
[A]: nelsan ellis


[Q]: love hina is a japanese manga.
[A]: love hina


[Q]: national museum of korea(국립중앙박물관, 國立中央博物館) is a national museum in yongsan district, seoul.
[A]:
national museum of korea