Question: who did the united states fight in world war two
[{'answer': 'Germany', 'provenance': [{'wikipedia_id': '4653534', 'title': 'Military history of the United States during World War II', 'start_paragraph_id': 1, 'start_character': 731, 'end_paragraph_id': 1, 'end_character': 738, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Italy', 'provenance': [{'wikipedia_id': '4653534', 'title': 'Military history of the United States during World War II', 'start_paragraph_id': 1, 'start_character': 743, 'end_paragraph_id': 1, 'end_character': 748, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Japan', 'provenance': [{'wikipedia_id': '4653534', 'title': 'Military history of the United States during World War II', 'start_paragraph_id': 2, 'start_character': 767, 'end_paragraph_id': 2, 'end_character': 772, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]