Question: when was the bellagio in las vegas built
[{'answer': '1998', 'provenance': [{'wikipedia_id': '693749', 'title': 'Bellagio (resort)', 'start_paragraph_id': 8, 'start_character': 31, 'end_paragraph_id': 8, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::History.:Background and opening (1990s).\n'}]}, {'provenance': [{'wikipedia_id': '693749', 'title': 'Bellagio (resort)', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 667, 'bleu_score': 0.9518100826915871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18388750497627072606}, 'section': 'Section::::History.:Background and opening (1990s).\n'}]}]