Question: who was the oldest player ever in the nfl
[{'answer': 'George Frederick Blanda', 'provenance': [{'wikipedia_id': '344221', 'title': 'George Blanda', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '344221', 'title': 'George Blanda', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 761, 'bleu_score': 0.8431277077930801, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8706666460518013681}, 'section': 'Section::::Abstract.'}]}]