Complex sentence: From birth he had "osteogenesis imperfecta", a genetic disease that causes brittle bones and, in his case, short stature, he became one of the most accomplished jazz pianists of his generation despite having arms that caused him pain.
Split into simpler sentences: From birth he had "osteogenesis imperfecta", a genetic disease that causes brittle bones and, in his case, short stature. He became one of the most accomplished jazz pianists of his generation despite having arms that caused him pain.