Question: which us city created the first formal us police department
[{'answer': 'Philadelphia', 'provenance': [{'wikipedia_id': '23627', 'title': 'Police', 'start_paragraph_id': 63, 'start_character': 203, 'end_paragraph_id': 63, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::History.:Modern police.:Other countries.:United States.\n'}]}, {'provenance': [{'wikipedia_id': '23627', 'title': 'Police', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 411, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 691484920901955339}, 'section': 'Section::::History.:Modern police.:Other countries.:United States.\n'}]}]