 Complete the following phrase:  Dogadov was leader of the Kazan Metal Workers Union and participated in the 1905 Russian Revolution and was later arrested in 1907. He then moved to Baku and was active inthr Bolshevik circles of the Caucasus. In 1910 he was sent to France and was student in the Longjumeau Party School and after the end of his studies he returned to Kazan and became a delegate to the 