Complex sentence: Built in 1998 by Fincantieri Cantieri Navali Italiani in Monfalcone (Hull Number 5956), Italy, at a cost of approximately US $450 million, she was the largest and most expensive passenger ship ever built at the time.
Split into simpler sentences: Built in 1998 by Fincantieri Cantieri Navali Italiani in Monfalcone, Italy, with hull number 5956, at a cost of approximately US $450 million. She was the largest and most expensive passenger ship ever built at the time.