Question: the us and the soviet union became important members in
[{'answer': 'the United Nations', 'provenance': [{'wikipedia_id': '26779', 'title': 'Soviet Union', 'start_paragraph_id': 5, 'start_character': 527, 'end_paragraph_id': 5, 'end_character': 545, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26779', 'title': 'Soviet Union', 'start_paragraph_id': 45, 'start_character': 0, 'end_paragraph_id': 45, 'end_character': 860, 'bleu_score': 0.8801398154580251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13953258145099050778}, 'section': 'Section::::History.:Stalin era.:World War II.\n'}]}]