Question: which city was the capital of the former soviet union and is today the capital of russia
[{'answer': 'Moscow', 'provenance': [{'wikipedia_id': '19004', 'title': 'Moscow', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19004', 'title': 'Moscow', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 552, 'bleu_score': 0.66396009404499, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15520876761037923823}, 'section': 'Section::::Abstract.'}]}]