Complex sentence: Approximately 70 years before the present, ten year old, polish, Jewish Leopold (Leo) Gursky falls in love with his neighbor Alma Mereminski and starts a relationship that develops over the course of ten years.
Split into simpler sentences: Approximately 70 years before the present, the ten year old, Polish, Jewish Leopold (Leo) Gursky falls in love with his neighbor Alma Mereminski. The two begin a relationship that develops over the course of ten years.