Question: when does the atlanta falcons new stadium open
[{'answer': 'August 26 , 2017', 'provenance': [{'wikipedia_id': '36962066', 'title': 'Mercedes-Benz Stadium', 'start_paragraph_id': 32, 'start_character': 292, 'end_paragraph_id': 32, 'end_character': 308, 'bleu_score': 1.0, 'section': 'Section::::Design.:Construction delays.\n'}]}]