Complex sentence: The Cidade da Música is a cultural complex located in Barra da Tijuca in the "West Zone" of Rio de Janeiro, Brazil, which was originally scheduled to open in December 2008, but the opening has been postponed.
Split into simpler sentences: The Cidade da Música is a cultural complex located in Barra da Tijuca in the "West Zone" of Rio de Janeiro, Brazil. Which was originally scheduled to open in December 2008, but the opening has been postponed.