Question: when was hard rock stadium in miami built
[{'answer': 'August 16 , 1987', 'provenance': [{'wikipedia_id': '362322', 'title': 'Hard Rock Stadium', 'start_paragraph_id': 10, 'start_character': 56, 'end_paragraph_id': 10, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::History and facts.:Dolphins.\n'}]}]