Complex sentence: Lyra's original surname, Belacqua, is the name of a character in Dante's Divine Comedy, a soul in the ante-purgatory, representing those who wait until the last opportunity before turning to God.
Split into simpler sentences: Lyra's original surname, Belacqua, is the name of a character in Dante's Divine Comedy. The character Belacqua is a soul in the ante-purgatory, representing those who wait until the last opportunity before turning to God.