Complex sentence: A C Wharton, Jr. is a Tennessee Democratic politician who was the 63rd mayor of Memphis, Tennessee and previously mayor of Shelby County, the first African American to serve in that office.
Split into simpler sentences: A C Wharton, Jr. is a Tennessee Democratic politician who is the mayor of Memphis, Tennessee. Previously, he was elected as mayor of Shelby County, the first African American to serve in that office.