Question: where did the tv show hill street blues take place
[{'answer': 'an unnamed large city', 'provenance': [{'wikipedia_id': '203208', 'title': 'Hill Street Blues', 'start_paragraph_id': 1, 'start_character': 231, 'end_paragraph_id': 1, 'end_character': 252, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '203208', 'title': 'Hill Street Blues', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 651, 'bleu_score': 0.9496016038707511, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14866219282838558500}, 'section': 'Section::::Abstract.'}]}]