Complex sentence: Zangwill was born in London on January 21,1864 in a family of Jewish immigrants from Czarist Russia, to Moses Zangwill from what is now Latvia and Ellen Hannah Marks Zangwill from what is now Poland.
Split into simpler sentences: Zangwill was born in London on January 21,1864, in a family of Jewish immigrants from Czarist Russia. His father, Moses Zangwill, was from what is now Latvia, and his mother, Ellen Hannah Marks Zangwill, was from what is now Poland.