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]: nexon corporation is a korean gaming corporation and developer of online games and mmorpgs.
[A]: nexon


[Q]: the gandaki river is one of the major rivers of nepal.
[A]: gandaki river


[Q]: hou zongbin (; january 1929 – 14 november 2017) was a chinese politician.
[A]:
hou zongbin