Complex sentence: Julian Marchlewski (May 17,1866-March 22,1925) was a Polish and Soviet communist functionary with the education of an economist, also known under the aliases Karski and Kujawiak.
Split into simpler sentences: Julian Marchlewski (May 17,1866-March 22,1925) was a Polish and Soviet communist functionary with an education in economics. He was also known under the aliases Karski and Kujawiak.