Complex sentence: It has one inside level which has stores, a cafe, Amtrak and SEPTA ticket offices, a car rental office, and a post office; passengers board their trains on the second story train platforms.
Split into simpler sentences: It has one inside level which has stores, a cafe, Amtrak and SEPTA ticket offices, a car rental office, and a post office. Passengers board their trains on the second story train platforms.