 Complete the following phrase:  Rykov joined the Russian Social Democratic Labour Party RSDLP in 1898 and supported its Bolshevik faction when the party split into Bolsheviks and Mensheviks at its Second Congress in 1903. He worked as a Bolshevik agent in Moscow and Saint Petersburg and played an active role in the Russian Revolution of 1905. He was elected a member of the Partys Central Committee at its 