Complex sentence: Mull was born in Chicago, Illinois, and raised in North Ridgeville, Ohio, from age 2 to 15 years old, when his family moved to New Canaan, Connecticut, where he attended and graduated from public high school.
Split into simpler sentences: Mull was born in Chicago, Illinois, and moved with his family to North Ridgeville, Ohio, when he was two years old. They stayed there until he was to 15 years old, when his family moved to New Canaan, Connecticut, where he attended and graduated from public high school.