Question: what is the institutional principle that created three branches of government called
[{'answer': 'trias politica', 'provenance': [{'wikipedia_id': '28561', 'title': 'Separation of powers', 'start_paragraph_id': 1, 'start_character': 411, 'end_paragraph_id': 1, 'end_character': 425, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28561', 'title': 'Separation of powers', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 562, 'bleu_score': 0.978606533029418, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10846051258096076709}, 'section': 'Section::::Abstract.'}]}]