Complex sentence: She was originally built for the Russian Empire in 1914 by AG Vulcan in Stettin, Germany, and named "Tsar Mikhail Feodorovich", but in 1917 she was taken over by the Bolsheviks and renamed "Volynets".
Split into simpler sentences: She was originally built for the Russian Empire in 1914 by AG Vulcan in Stettin, Germany, and named "Tsar Mikhail Feodorovich". In 1917 she was taken over by the Bolsheviks and renamed "Volynets".