Question: when did the cold war alignment of britain and the united states versus the soviet union begin
[{'answer': '1945', 'provenance': [{'wikipedia_id': '420956', 'title': 'Origins of the Cold War', 'start_paragraph_id': 1, 'start_character': 159, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '420956', 'title': 'Origins of the Cold War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 735, 'bleu_score': 0.9046391672996711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2943298552987225604}, 'section': 'Section::::Abstract.'}]}]