 Complete the following phrase:  Rykov joined the Russian Social Democratic Labour Party in 1898, and after it split into Bolshevik and Menshevik factions in 1903, he joined the Bolsheviks, which were led by Vladimir Lenin. He played an active part in the 1905 Russian Revolution. Months prior to the October Revolution of 1917, he became a member of the Petrograd and Moscow Soviets and was elected to the Bolshevik Party Central Committee in JulyAugust of the same year, during the 