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]: the family computer disk system was a disc add-on for the nintendo entertainment system that was only released in japan despite being announced in america.
[A]: family computer disk system


[Q]: arabesque is an artistic decoration.
[A]: arabesque


[Q]: "god defend new zealand" is one of the national anthems of new zealand.
[A]:
god defend new zealand