Question: when did sweet and sour skittles come out
[{'answer': '2016', 'provenance': [{'wikipedia_id': '21846317', 'title': 'List of Skittles products', 'start_paragraph_id': 208, 'start_character': 70, 'end_paragraph_id': 208, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::List.\n'}]}]