Complex sentence: For instance, he scheduled Fats Domino "at the show's end in case he had to cancel a guest"--a year later he would do that to Sam Cooke, cutting him off in the middle of "You Send Me".
Split into simpler sentences: For instance, he scheduled Fats Domino "at the show's end in case he had to cancel a guest". A year later the same thing happened to Sam Cooke, cutting him off in the middle of "You Send Me".