Question: what is the newest royal carribean cruise ship
[{'answer': 'Ovation of the Seas', 'provenance': [{'wikipedia_id': '756754', 'title': 'Royal Caribbean International', 'start_paragraph_id': 17, 'start_character': 97, 'end_paragraph_id': 17, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Company and brand history.:Reorganisation and formation of Royal Caribbean Cruises Ltd..\n'}]}]