Complex sentence: Nearing Savannah, Clementine's walkie-talkie goes off, with an unknown man telling her she will be safe once he deals with Lee and the group, and promising her that her parents are waiting for her.
Split into simpler sentences: Nearing Savannah, Clementine's walkie-talkie goes off. An unknown man tells her she will be safe once he deals with Lee and the group, and promises her that her parents are waiting for her.