Question: when did the gopro hero session come out
[{'answer': 'July 6 , 2015', 'provenance': [{'wikipedia_id': '32546327', 'title': 'GoPro', 'start_paragraph_id': 84, 'start_character': 27, 'end_paragraph_id': 84, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Products.:HERO cameras.:HERO4.\n'}]}, {'provenance': [{'wikipedia_id': '32546327', 'title': 'GoPro', 'start_paragraph_id': 84, 'start_character': 0, 'end_paragraph_id': 84, 'end_character': 124, 'bleu_score': 0.910879922930628, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9657591600039591412}, 'section': 'Section::::Products.:HERO cameras.:HERO4.\n'}]}]