Complex sentence: In 1997 Greyhound Lines acquired "Carolina Trailways", one of the largest members of the National Trailways Bus System; in 1998, Greyhound acquired the intercity operations of "Southeastern Trailways".
Split into simpler sentences: In 1997 Greyhound Lines acquired "Carolina Trailways", one of the largest members of the National Trailways Bus System. In 1998, Greyhound acquired the intercity operations of "Southeastern Trailways".