Question: who was the 3rd leader of the soviet union
[{'answer': 'Georgy Malenkov', 'provenance': [{'wikipedia_id': '26865', 'title': 'List of leaders of the Soviet Union', 'start_paragraph_id': 6, 'start_character': 741, 'end_paragraph_id': 6, 'end_character': 756, 'bleu_score': 1.0, 'section': 'Section::::Summary.\n'}]}]