Question: how many public schools are there in chicago
[{'answer': '660', 'provenance': [{'wikipedia_id': '1488123', 'title': 'Chicago Public Schools', 'start_paragraph_id': 1, 'start_character': 265, 'end_paragraph_id': 1, 'end_character': 268, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]