Question: what country has the most athletes in this year's winter olympics
[{'answer': 'United States', 'provenance': [{'wikipedia_id': '961505', 'title': '2018 Winter Olympics', 'start_paragraph_id': 82, 'start_character': 7, 'end_paragraph_id': 82, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Broadcasting.\n'}]}]