Complex sentence: After riding one of his favorite horses around the track, he complained of chest pains and difficulty breathing and was rushed to Martin Memorial South Hospital in Stuart, Florida, where he was pronounced dead of a severe heart attack due to atherosclerosis.
Split into simpler sentences: After riding one of his favorite horses around the track, he complained of chest pains and difficulty breathing. He was rushed to Martin Memorial South Hospital in Stuart, Florida, where he was pronounced dead of a severe heart attack due to atherosclerosis.