Complex sentence: On the afternoon of July 6,1918, Blumkin along with an aide, Nikolai Andreyev, went to the residence of the German Ambassador on Denezhny Lane, where he gained entrance to the embassy by presenting forged documents.
Split into simpler sentences: On the afternoon of July 6,1918, Blumkin along with an aide, Nikolai Andreyev, went to the residence of the German Ambassador on Denezhny Lane. Blumkin gained entrance to the embassy by presenting forged documents.