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]: aerospace engineering is a field of engineering that specializes in vehicles that move in fluids.
[A]: aerospace engineering


[Q]: an aloha shirt (also known as a hawaiian shirt) is a type of shirt that comes from hawaii.
[A]: aloha shirt


[Q]: george yonashiro (与那城 ジョージ, yonashiro george, born november 28, 1950) is a brazilian-japanese former football player.
[A]:
george yonashiro