Complex sentence: Elected to the National Convention by the "département" of Haute-Loire, he was on a mission during the judgment of Louis XVI, but he wrote 13 January 1793, that he voted "death without appeal and without reprieve".
Split into simpler sentences: Elected to the National Convention by the "département" of Haute-Loire. He was on a mission during the judgment of Louis XVI, but he wrote 13 January 1793, that he voted "death without appeal and without reprieve".