Question: athenian reformer set up the council of 500
[{'answer': 'Cleisthenes', 'provenance': [{'wikipedia_id': '51992830', 'title': 'Athenian democracy', 'start_paragraph_id': 3, 'start_character': 19, 'end_paragraph_id': 3, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51992830', 'title': 'Athenian democracy', 'start_paragraph_id': 42, 'start_character': 0, 'end_paragraph_id': 42, 'end_character': 284, 'bleu_score': 0.918221068290973, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13247443663758640317}, 'section': 'Section::::Main bodies of governance.:The Boule.\n'}]}]