Complex sentence: Betty Jean Harrington, born Betty-Jean Maycock on December 13th, 1942 in Cleveland, Ohio, United States, was a member of the 1960 U.S. Women's Gymnastics Team that competed in the Summer Olympics in Rome, Italy.
Split into simpler sentences: Betty Jean Harrington, born Betty-Jean Maycock, was born December 13th, 1942 in Cleveland, Ohio. She was a member of the 1960 U.S. Women's Gymnastics Team that competed in the Summer Olympics in Rome, Italy.