Complex sentence: The album name came from the lyrics of a track recorded for the album: "End of the World", which ultimately did not appear on its final track list though was included as a bonus track on the European deluxe edition.
Split into simpler sentences: The album name came from the lyrics of a track recorded for the album: "End of the World", which ultimately did not appear on its final track list. However, it has been included as a bonus track on the European deluxe edition.