Question: where does the carbonation in beer come from
[{'answer': 'wort protein', 'provenance': [{'wikipedia_id': '1797851', 'title': 'Beer head', 'start_paragraph_id': 1, 'start_character': 196, 'end_paragraph_id': 1, 'end_character': 208, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'yeast', 'provenance': [{'wikipedia_id': '1797851', 'title': 'Beer head', 'start_paragraph_id': 1, 'start_character': 210, 'end_paragraph_id': 1, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'hop residue', 'provenance': [{'wikipedia_id': '1797851', 'title': 'Beer head', 'start_paragraph_id': 1, 'start_character': 220, 'end_paragraph_id': 1, 'end_character': 231, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1797851', 'title': 'Beer head', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 618, 'bleu_score': 0.924397002975967, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8402996900925329865}, 'section': 'Section::::Abstract.'}]}]