Question: when did the dji phantom 4 come out
[{'answer': 'January 2013', 'provenance': [{'wikipedia_id': '45706322', 'title': 'Phantom (UAV)', 'start_paragraph_id': 49, 'start_character': 60, 'end_paragraph_id': 49, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Phantom Drones (Legacy).:Phantom 1.\n'}]}]