Complex sentence: During filming of an episode of "Seinfeld" (The Bottle Deposit), Knight felt what he thought to be angina pains and sought the help of a cardiologist who told him that he 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.