Complex sentence: Baldwin V (d.1186), the son of Sibylla (daughter of Amalric I) by her first husband, William of Montferrat, was the nominal king of Jerusalem from 1183 to 1186, under the regency of Raymond III of Tripoli.
Split into simpler sentences: Baldwin V (1177-1186) was the son of Sibylla of Jerusalem and her first husband, William of Montferrat. He was the nominal king of Jerusalem from 1183 to 1186, under the regency of Raymond III of Tripoli.