Complex sentence: She lived in the 1980s for a time in New York City and would visit the U.S. more than a dozen times before her death from colon cancer at the age of 60 in Warsaw.
Split into simpler sentences: She lived in the 1980s for a time in New York City and would visit the U.S. more than a dozen times. She died from colon cancer at the age of 60 in Warsaw.