Question: radiocarbon dating is based on which decay process
[{'answer': 'radioactive decay', 'provenance': [{'wikipedia_id': '26197', 'title': 'Radiocarbon dating', 'start_paragraph_id': 2, 'start_character': 625, 'end_paragraph_id': 2, 'end_character': 642, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26197', 'title': 'Radiocarbon dating', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1205, 'bleu_score': 0.825567586542815, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2122537007913403089}, 'section': 'Section::::Abstract.'}]}]