Question: when did the gopro hero 4 come out
[{'answer': '24 September 2014'}, {'provenance': [{'wikipedia_id': '32546327', 'title': 'GoPro', 'start_paragraph_id': 26, 'start_character': 0, 'end_paragraph_id': 26, 'end_character': 207, 'bleu_score': 0.6348019716309781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9752460630885741486}, 'section': 'Section::::Product lines.:HERO cameras.\n'}]}]