Complex sentence: Kramer and Mickey enter, still arguing about being given (the role of) gonorrhea, and Sophie tells them her tractor story: she got gonorrhea from riding a tractor in her bathing suit.
Split into simpler sentences: Kramer and Mickey enter, still arguing about being given (the role of) gonorrhea, and Sophie tells them her tractor story. She says she got the gonorrhea from riding a tractor in her bathing suit.