Complex sentence: Johnson sought a reprieve, asserting that he wanted to donate a portion of his liver to his ailing sister, Deborah Otis, who had non-alcoholic cirrhosis of the liver and was in need of a transplant.
Split into simpler sentences: Johnson sought a reprieve, asserting that he wanted to donate a portion of his liver to his ailing sister, Deborah Otis. She was suffering from non-alcoholic cirrhosis of the liver and was in need of a transplant.