Complex sentence: In 1946, at the age of twelve, Richard Bernstein developed type 1 diabetes, and for more than two decades, Bernstein was what he calls, "an ordinary diabetic"--one who dutifully followed doctor's orders.
Split into simpler sentences: In 1946, at the age of twelve, Richard Bernstein developed type 1 diabetes. For more than two decades, Bernstein was what he calls, "an ordinary diabetic"--one who dutifully followed doctor's orders.