Complex sentence: At the intercession of Saint Nilus the Younger, one of his countrymen, Otto III spared John XVI's life and sent him to a monastery in Germany, where he would die in 1001.
Split into simpler sentences: At the intercession of Saint Nilus the Younger, one of his countrymen, Otto III spared John XVI's life. Instead, he was sent to a monastery in Germany, where he would die in 1001.