Question: when did ritz carlton become part of marriott
[{'answer': '1998', 'provenance': [{'wikipedia_id': '9428452', 'title': 'The Ritz-Carlton Hotel Company', 'start_paragraph_id': 46, 'start_character': 106, 'end_paragraph_id': 46, 'end_character': 110, 'bleu_score': 1.0, 'section': 'Section::::Current company.:The corporate years: 1983–1999.\n'}]}, {'provenance': [{'wikipedia_id': '9428452', 'title': 'The Ritz-Carlton Hotel Company', 'start_paragraph_id': 46, 'start_character': 0, 'end_paragraph_id': 46, 'end_character': 441, 'bleu_score': 0.6882820232750491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4256885193117778881}, 'section': 'Section::::Current company.:The corporate years: 1983–1999.\n'}]}]