 Complete the following phrase:  The CPRF can trace its origins to the Russian Social Democratic Labour Party which was established in 1898 and the party split in 1903 into a Menshevik minority and Bolshevik majority faction; the latter, led by Vladimir Lenin, is the direct ancestor of the Communist Party of the Soviet Union CPSU and is the party that seized power in the October Revolution of 1917. After the CPSU was banned in 1991 by thenRussian President Boris Yeltsin in the aftermath of the 