Complex sentence: The National Cholesterol Education Program is a program by the National Heart, Lung and Blood Institute of the NIH aimed at reducing cardiovascular disease due to hypercholesterolemia (evelated cholesterol levels) in the United States of America.
Split into simpler sentences: The National Cholesterol Education Program is a program managed by the National Heart, Lung and Blood Institute, a division of the NIH. It goal is to reduce increased cardiovascular disease rates due to hypercholesterolemia (evelated cholesterol levels) in the United States of America.