Complex sentence: During filming of an episode of "Seinfeld", Knight felt what he thought to be angina pains and sought the help of a cardiologist, who said the actor was morbidly obese, had high blood pressure, and was near diabetic.
Split into simpler sentences: During filming of an episode of "Seinfeld", Knight felt what he thought to be angina pains and sought the help of a cardiologist. He said the actor was morbidly obese, had high blood pressure, and was near diabetic.