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]: 2ne1 is a pop group of female singers from south korea.
[A]: 2ne1


[Q]: the waldorf astoria chicago, formerly the elysian hotel chicago, is a luxury hotel located at 11 east walton street in the gold coast area of chicago, illinois.
[A]: waldorf astoria chicago


[Q]: roman josi (born june 1, 1990) is a swiss ice hockey defenceman.
[A]:
roman josi