Complex sentence: Carson, who is of English descent, plays Jeannie MacLennan, a 28-year-old Scottish woman, like Andrew Carnegie originally from Dunfermline, who comes to New York City to better herself financially.
Split into simpler sentences: Carson, who is of English descent, plays Jeannie MacLennan, a 28-year-old Scottish woman, Like Andrew Carnegie, Jeannie is originally from Dunfermline. She comes to New York City to better herself financially.