Question: when was the golden nugget built in las vegas
[{'answer': '1946', 'provenance': [{'wikipedia_id': '1273745', 'title': 'Golden Nugget Las Vegas', 'start_paragraph_id': 4, 'start_character': 42, 'end_paragraph_id': 4, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1273745', 'title': 'Golden Nugget Las Vegas', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 770, 'bleu_score': 0.985764216565234, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14732559216879649878}, 'section': 'Section::::History.\n'}]}]