Question: who developed the idea of separation of powers
[{'answer': 'Aristotle', 'provenance': [{'wikipedia_id': '28561', 'title': 'Separation of powers', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::History.:Antiquity.\n'}]}, {'provenance': [{'wikipedia_id': '28561', 'title': 'Separation of powers', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 343, 'bleu_score': 0.931598023953435, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18290413662984842570}, 'section': 'Section::::History.:Antiquity.\n'}]}]