Complex sentence: The "Teatro degli Arcimboldi" is a theatre and opera house in Milan which was built over a twenty-seven month period in anticipation of the closure and subsequent nearly three-year long renovation of Milan's La Scala opera house in December 2001.
Split into simpler sentences: The "Teatro degli Arcimboldi" is a theatre and opera house in Milan. It was built over a twenty-seven month period in anticipation of the closure and subsequent nearly three-year long renovation of Milan's La Scala opera house in December 2001.