Question: how many nuclear weapons did the soviet union have in 1945
[{'answer': '0', 'provenance': [{'wikipedia_id': '38404161', 'title': 'Historical nuclear weapons stockpiles and nuclear tests by country', 'start_paragraph_id': 3, 'start_character': 110, 'end_paragraph_id': 3, 'end_character': 111, 'bleu_score': 1.0, 'section': 'Section::::Nuclear weapons stockpiles.\n'}]}]