Complex sentence: The Coral Princess and Island Princess are the only two Panamax ships operated by Princess Cruises and are the only Princess ships built in France by Chantiers de l'Atlantique.
Split into simpler sentences: The Coral Princess and Island Princess are the only two Panamax ships operated by Princess Cruises. She, along with her sister ship were built in France by Chantiers de l'Atlantique.