Question: when's the last time the philadelphia eagles played on christmas day
[{'answer': '2017', 'provenance': [{'wikipedia_id': '15541402', 'title': 'National Football League Christmas games', 'start_paragraph_id': 1, 'start_character': 208, 'end_paragraph_id': 1, 'end_character': 212, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]