Complex sentence: The public didn't really accept the new Lone Ranger, actor John Hart, so the owners of the program relented and rehired Moore at his requested salary, who stayed with the program until it ended the first-run production in 1957.
Split into simpler sentences: The public didn't really accept the new Lone Ranger, actor John Hart, so the owners of the program relented and rehired Moore at his requested salary. He stayed with the program until it ended first-run production in 1957.