Complex sentence: Calatrava has designed a futuristic train station, the World Trade Center Transportation Hub, at the rebuilt World Trade Center in New York City is expected to open in 2015, six years behind schedule, at a cost of $4 billion, twice the original budget.
Split into simpler sentences: Calatrava has designed a futuristic train station, the World Trade Center Transportation Hub, at the rebuilt World Trade Center in New York City. It is expected to open in 2015, six years behind schedule, at a cost of $4 billion, twice the original budget.