Complex sentence: Adragon De Mello (born 1976) graduated from the University of California, Santa Cruz with a degree in computational mathematics in 1988, at age 11, at the time the youngest college graduate in U.S. history (a record since broken by Michael Kearney).
Split into simpler sentences: Adragon De Mello (born 1976) graduated from the University of California, Santa Cruz with a degree in computational mathematics in 1988, at age 11. At the time, he was the youngest college graduate in U.S. history (a record since broken by Michael Kearney).