Complex sentence: The answer of Güyük the great Khan of the Mongols to the pope's envoys was that the pope himself and the kings of Europe should submit to the Mongols the message was handed to the pope's Franciscan emissary Giovanni da Pian del Carpine.
Split into simpler sentences: The answer of Güyük the great Khan of the Mongols to the pope's envoys was that the pope himself and the kings of Europe should submit to the Mongols. D. Wilkinson the message was handed to the pope's Franciscan emissary Giovanni da Pian del Carpine.