Complex sentence: It was an open-mic call-in show, known as "Nitecaps", and by the early 70s, his show would become the first nationally syndicated talk show, when the Mutual Broadcasting System agreed to syndicate it.
Split into simpler sentences: It was an open-mic call-in show, known as "Nitecaps". By the early 70s, this show would become the first nationally syndicated talk show, when the Mutual Broadcasting System agreed to syndicate it.