Complex sentence: In the past, other well-known dignitaries who have also spoken at the national awards program included Tom Brokaw, Bob Schieffer, Tim Russert, Chris Matthews, George Will, Jeffrey Toobin and master of ceremonies, Bill Press.
Split into simpler sentences: In the past, other well-known dignitaries who have also spoken at the national awards program. They included Tom Brokaw, Bob Schieffer, Tim Russert, Chris Matthews, George Will, Jeffrey Toobin and master of ceremonies, Bill Press.