Question

in which year Russian social democratic labour party was founded

Answer 1

In January 1912, Lenin's Proletary Bolshevik group called a conference in Prague and expelled the liquidators, ultimatists and recallists from the RSDLP, which officially led to the creation of a separate party, known as the Russian Social Democratic Labour Party (Bolshevik).
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Answer 2

March 1898, Minsk, Belarus