Complex sentence: As well as making films independently, she has collaborated frequently with best friend-Francesca Sophia-with whom she co-founded Pretend We Don't Exist Productions in 2005 when they co-directed "Domino".
Split into simpler sentences: As well as making films independently, she has collaborated with her friend Francesca Sophia. Stuart and Sophia co-founded Pretend We Don't Exist Productions in 2005, when they co-directed "Domino".