Question: What is the name of this faction of the Marxist Russian Social Democratic Labour Party, which split from the Menshevik faction and who killed Alexander Bagration of Mukhrani?
{'answer': 'Bolsheviks', 'supporting_facts': [['Alexander Bagration of Mukhrani', 0], ['Alexander Bagration of Mukhrani', 1], ['Bolsheviks', 0]]}