Question: what type of reaction is the decay of carbon-14
[{'answer': 'beta decay', 'provenance': [{'wikipedia_id': '146250', 'title': 'Carbon-14', 'start_paragraph_id': 2, 'start_character': 420, 'end_paragraph_id': 2, 'end_character': 430, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '146250', 'title': 'Carbon-14', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 758, 'bleu_score': 0.6160997109895631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11522511537382189751}, 'section': 'Section::::Abstract.'}]}]