Complex sentence: Sidney Katz, MD (born 1924) was a pioneering American physician, scientist, educator, author, and public servant who developed the Index of Independence of Activities for Daily Living (ADLs) in a career spanning more than sixty years.
Split into simpler sentences: Sidney Katz, MD (born 1924) was a pioneering American physician, scientist, educator, author, and public servant. Although he is best known for developing the developing the Index of Independence of Activities for Daily Living (ADLs), his career spanned more than sixty years.