Question: when did the first coca cola come out
[{'answer': 'May 8 , 1886', 'provenance': [{'wikipedia_id': '6690', 'title': 'Coca-Cola', 'start_paragraph_id': 8, 'start_character': 238, 'end_paragraph_id': 8, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::History.:19th-century historical origins.\n'}]}]