Complex sentence: She graduated from I.S.I.A. (Istituto Superiore Industrie Artistiche) in Florence and then she moved from Florence to Milan, where she founded her professional studio in 1989.
Split into simpler sentences: She graduated from I.S.I.A. (Istituto Superiore Industrie Artistiche) in Florence. Then she moved from Florence to Milan, where she founded her professional studio in 1989.