Question: what is the most popular holiday in america
[{'answer': 'Christmas', 'provenance': [{'wikipedia_id': '399372', 'title': 'Public holidays in the United States', 'start_paragraph_id': 3, 'start_character': 86, 'end_paragraph_id': 3, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]