Complex sentence: He suffered a severe heart attack in September, 1954 and returned to his home Ocala to recuperate, and in early 1955 he decided to resign as president and withdraw from day-to-day operations.
Split into simpler sentences: He suffered a severe heart attack in September 1954 and returned to his home Ocala to recuperate. In early 1955 he decided to resign as president and withdraw from day-to-day operations.