Complex sentence: Competitors have included the Airbus A300, A310, and A330-200, while a successor, the 787 Dreamliner, entered service in October 2011.
Split into simpler sentences: Competitors have included the Airbus A300, A310, and A330-200. The 767 remains in production but its successor, the 787 Dreamliner, entered service in October 2011.