Question: who did the city council of siena commission to fresco the city hall with scenes of the government
[{'answer': 'Ambrogio Lorenzetti', 'provenance': [{'wikipedia_id': '31149687', 'title': 'The Allegory of Good and Bad Government', 'start_paragraph_id': 1, 'start_character': 86, 'end_paragraph_id': 1, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31149687', 'title': 'The Allegory of Good and Bad Government', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 559, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13437364589382774343}, 'section': 'Section::::Abstract.'}]}]