Question: when is the army vs navy football game
[{'answer': 'December 8 , 2018', 'provenance': [{'wikipedia_id': '604299', 'title': 'Army–Navy Game', 'start_paragraph_id': 13, 'start_character': 3, 'end_paragraph_id': 13, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Series history.\n'}]}]