Question: what is the worst nfl record in history
[{'answer': 'Detroit', 'provenance': [{'wikipedia_id': '14417906', 'title': 'List of winless seasons', 'start_paragraph_id': 58, 'start_character': 224, 'end_paragraph_id': 58, 'end_character': 231, 'bleu_score': 1.0, 'section': 'Section::::Other North American leagues.:Major League Baseball.\n'}]}, {'answer': 'Most losses in a single season'}]