Question: when was the luxor built in las vegas
[{'answer': 'March 1992', 'provenance': [{'wikipedia_id': '724762', 'title': 'Luxor Las Vegas', 'start_paragraph_id': 6, 'start_character': 42, 'end_paragraph_id': 6, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '724762', 'title': 'Luxor Las Vegas', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 547, 'bleu_score': 0.842928914326995, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11746795860675034988}, 'section': 'Section::::History.\n'}]}]