Complex sentence: Between the end of the 19th century and the first decades of the 20th, the province received a variety of immigrants; among them were Volga Germans and Mennonites from Russia, Germany, and Canada.
Split into simpler sentences: Between the end of the 19th century and the first decades of the 20th, the province received a variety of immigrants. Among them were Volga Germans and Mennonites from Russia, Germany, and Canada.