Complex sentence: In 1950, a Hungarian couple, Peter and Margit, are forced to flee from the oppressive communist country for the USA with their eldest daughter Maria, but are forced to leave behind their infant daughter Suzanne who is raised by kindly foster couple.
Split into simpler sentences: In 1950, a Hungarian couple, Peter and Margit, are forced to flee from their oppressive Communist country for the USA with their eldest daughter Maria. Unfortuinately, they are forced to leave behind their infant daughter Suzanne, who is raised by kindly foster couple.