Complex sentence: David and Darlene break up three times throughout the course of the show, each for a longer period of time than the last; they always end up back together eventually David gets Darlene pregnant; causing them to decide to get married.
Split into simpler sentences: David and Darlene break up three times throughout the course of the show, each for a longer period of time than the last; they always end up back together. Eventually David gets Darlene pregnant; causing them to decide to get married.