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 wii u is a video game console that was released by nintendo on november 18, 2012, and is the successor of the wii.
[A]: wii u

[Q]: an electronic book (also called an e-book, ebook or digital book) is a book in digital form.
[A]: e-book

[Q]: holy week (latin: "hebdomas sancta" or "hebdomas maior", "greater week"; greek: " ", "megale hebdomas") is the commemoration of the last week of jesus christ's ministry on earth.
[A]:
holy week