Complex sentence: She moved between New York, London and Tokyo with her family as a child and spent most of her teenage years in Japan before moving to London where she trained at "Rose Bruford College" in South East London.
Split into simpler sentences: She moved between New York, London and Tokyo with her family as a child. She spent most of her teenage years in Japan before moving to London where she trained at "Rose Bruford College" in South East London.