Question: where does the caffeine in coca cola come from
[{'answer': 'kola nuts', 'provenance': [{'wikipedia_id': '6690', 'title': 'Coca-Cola', 'start_paragraph_id': 1, 'start_character': 439, 'end_paragraph_id': 1, 'end_character': 448, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6690', 'title': 'Coca-Cola', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 617, 'bleu_score': 0.873295185509338, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16895437295146603232}, 'section': 'Section::::Abstract.'}]}]