Complex sentence: In' (2015), Leia is the founder and General of the Resistance against the First Order and has a son with Han named Ben, who adopted the name Kylo Ren after turning to the dark side of the Force.
Split into simpler sentences: In' (2015), Leia is the founder and General of the Resistance against the First Order. She and Han have a son named Ben, who adopted the name Kylo Ren after turning to the dark side of the Force.