Question: where does caffeine come from in energy drinks
[{'answer': 'ingredients used', 'provenance': [{'wikipedia_id': '6868', 'title': 'Caffeine', 'start_paragraph_id': 127, 'start_character': 340, 'end_paragraph_id': 127, 'end_character': 356, 'bleu_score': 1.0, 'section': 'Section::::Products.:Beverages.:Soft drinks and energy drinks.\n'}]}, {'answer': 'additive derived from the product of decaffeination or from chemical synthesis'}, {'provenance': [{'wikipedia_id': '6868', 'title': 'Caffeine', 'start_paragraph_id': 127, 'start_character': 0, 'end_paragraph_id': 127, 'end_character': 625, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9294555187930464067}, 'section': 'Section::::Products.:Beverages.:Soft drinks and energy drinks.\n'}]}]