Question: where does the most substrate level phosphorylation occur
[{'answer': 'in the cytoplasm of cells', 'provenance': [{'wikipedia_id': '2027148', 'title': 'Substrate-level phosphorylation', 'start_paragraph_id': 4, 'start_character': 39, 'end_paragraph_id': 4, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}, {'answer': 'in mitochondria', 'provenance': [{'wikipedia_id': '2027148', 'title': 'Substrate-level phosphorylation', 'start_paragraph_id': 4, 'start_character': 87, 'end_paragraph_id': 4, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}, {'provenance': [{'wikipedia_id': '2027148', 'title': 'Substrate-level phosphorylation', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 424, 'bleu_score': 0.852053129993093, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17879148821301735982}, 'section': 'Section::::Overview.\n'}]}]