Question: where is the tournament of nations being played
[{'answer': 'the United States', 'provenance': [{'wikipedia_id': '57437998', 'title': '2018 Tournament of Nations', 'start_paragraph_id': 1, 'start_character': 172, 'end_paragraph_id': 1, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '57437998', 'title': '2018 Tournament of Nations', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 282, 'bleu_score': 0.958740481558872, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14640813356222699327}, 'section': 'Section::::Abstract.'}]}]