Complex sentence: He came up with the idea when he was short of material for a radio show, the first Odd Ode was a comic, yet still sentimental, reading of Edgar Wallace's war poem "Dreaming of Thee".
Split into simpler sentences: He came up with the idea when he was short of material for a radio show. The first Odd Ode was a comic, yet sentimental, reading of Edgar Wallace's war poem "Dreaming of Thee".