 Complete the following phrase:  In 1917 the Central Committee of the Russian Social-Democratic Labour Party Bolsheviks had begun to allow mass membership, without consulting with Lenin. On July 1, 1917 the Central Committee sent out an instruction to local party organizations to build a broad democratic unity ahead of the elections, to reach out to Menshevik-Internationalists, left-wing SRs and trade unions. In the wake of the abortive July uprising organized by the revolutionary Petrograd Bolshevik Committee and the Military Organization, the moderates of the Central Committee again appealed to build a left socialist bloc and invited the Menshevik-Internationalists to attend the upcoming 