Complex sentence: On April 20,1972, Scott, who was 19 years old, married his high school sweetheart, Frances Annette Holland (born February 11,1952), who was 20; the couple has two daughters.
Split into simpler sentences: On April 20,1972, Scott married his high school sweetheart, Frances Annette Holland. He was 19 years old and she was 20; the couple has two daughters.