Complex sentence: John Berryman was born John Allyn Smith, Jr. in Oklahoma where he was raised until the age of 10, when his father, John Smith, a banker, and his mother, Martha, a schoolteacher, moved to Tampa, Florida.
Split into simpler sentences: John Berryman was born John Allyn Smith, Jr. in Oklahoma where he was raised until the age of 10. His father, John Smith, a banker, and his mother, Martha, a schoolteacher, moved to Tampa, Florida.