Complex sentence: The world's first stapedectomy is credited to Dr. John J. Shea, Jr., performed in May, 1956, the first patient being a 54 year-old housewife who could no longer hear even with a hearing aid.
Split into simpler sentences: The world's first stapedectomy is credited to Dr. John J. Shea, Jr., performed in May, 1956. The first patient being a 54 year-old housewife who could no longer hear even with a hearing aid.