Complex sentence: Roy C. Afflerbach (born February 6,1945 in Allentown, Pennsylvania), was the Mayor of Allentown, Pennsylvania--the third largest city in Pennsylvania--from 2002-2006.
Split into simpler sentences: Roy C. Afflerbach (born February 6,1945 in Allentown, Pennsylvania) is an United States politician. He was Mayor of Allentown, Pennsylvania, the third largest city in Pennsylvania, from 2002-2006.