Question: list by symbol the types of atoms that can be found in carbohydrates
[{'answer': 'carbon ( C )', 'provenance': [{'wikipedia_id': '5932', 'title': 'Carbohydrate', 'start_paragraph_id': 1, 'start_character': 49, 'end_paragraph_id': 1, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'hydrogen ( H )', 'provenance': [{'wikipedia_id': '5932', 'title': 'Carbohydrate', 'start_paragraph_id': 1, 'start_character': 61, 'end_paragraph_id': 1, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'oxygen ( O )', 'provenance': [{'wikipedia_id': '5932', 'title': 'Carbohydrate', 'start_paragraph_id': 1, 'start_character': 78, 'end_paragraph_id': 1, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5932', 'title': 'Carbohydrate', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 487, 'bleu_score': 0.6760055015865051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 29872492414307046}, 'section': 'Section::::Abstract.'}]}]