Question: when did the packard plant close in detroit
[{'answer': '1958', 'provenance': [{'wikipedia_id': '26326433', 'title': 'Packard Automotive Plant', 'start_paragraph_id': 4, 'start_character': 217, 'end_paragraph_id': 4, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Design and operation.\n'}]}, {'provenance': [{'wikipedia_id': '26326433', 'title': 'Packard Automotive Plant', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 315, 'bleu_score': 0.96188712955549, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2936045191224894411}, 'section': 'Section::::Design and operation.\n'}]}]