Complex sentence: In May 1945, Klein was liberated by forces of the United States Army in Volary, Czechoslovakia; these forces included Kurt Klein, who was born in Europe and immigrated to the United States to escape Nazism.
Split into simpler sentences: In May 1945, Klein was liberated by forces of the United States Army in Volary, Czechoslovakia. He was born in Europe and immigrated to the United States to escape Nazism.