Question: who was the leader of the bolsheviks when they overthrew the russian monarchy
[{'answer': 'Vladimir Lenin', 'provenance': [{'wikipedia_id': '25762', 'title': 'Russian Revolution', 'start_paragraph_id': 3, 'start_character': 519, 'end_paragraph_id': 3, 'end_character': 533, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]