Question: where does the energy come from in a nuclear fission reaction
[{'answer': 'The fission process', 'provenance': [{'wikipedia_id': '22054', 'title': 'Nuclear fission', 'start_paragraph_id': 1, 'start_character': 180, 'end_paragraph_id': 1, 'end_character': 199, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22054', 'title': 'Nuclear fission', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 343, 'bleu_score': 0.876484548290347, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 769239069861775998}, 'section': 'Section::::Abstract.'}]}]