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: in egyptain mythology sopdet was the goddess of the star sothis.

A: sopdet
****
Q: the nissan maxima is an automobile produced by nissan motor company in seven generations since 1981.

A: nissan maxima
****
Q: 2ne1 is a pop group of female singers from south korea.

A:
2ne1
****