Complex sentence: He was one of the presenters of "Cat in a Sack", a children's program that was broadcast from 1970 to 1984, on which his book, "Duel," was first aired as a radio drama.
Split into simpler sentences: He was one of the presenters of "Cat in a Sack", a children's program that was broadcast from 1970 to 1984. On that program his book "Duel" was first aired as a radio drama.