Question: when was the product red iphone 7 released
[{'answer': 'March 21 , 2017', 'provenance': [{'wikipedia_id': '51539250', 'title': 'IPhone 7', 'start_paragraph_id': 10, 'start_character': 3, 'end_paragraph_id': 10, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '51539250', 'title': 'IPhone 7', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 303, 'bleu_score': 0.9240646635757881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11787796649988801421}, 'section': 'Section::::History.\n'}]}]