Complex sentence: Jump5 officially disbanded on Sunday, December 16,2007 because of complications in the group such as betrayal among them on their upcoming album "The Birdhouse", which was supposed to be released on January 2008.
Split into simpler sentences: Jump5 officially disbanded on Sunday, December 16,2007. Such as betrayal between them on their upcoming album "The Birdhouse", which was supposed to be released on January 2008.