Question: what is the oldest football team in america
[{'answer': 'Green Bay Packers', 'provenance': [{'wikipedia_id': '19333610', 'title': 'History of the National Football League', 'start_paragraph_id': 1, 'start_character': 661, 'end_paragraph_id': 1, 'end_character': 678, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19333610', 'title': 'History of the National Football League', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 757, 'bleu_score': 0.8750387677794741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1499991429311380097}, 'section': 'Section::::Abstract.'}]}]