Complex sentence: Josephus writes of a Jewish sect, whose leader was James the Just (the brother of Jesus) and includes sections on John the Baptist, the High Priest Annas, Pontius Pilate, and Jesus called the Messiah.
Split into simpler sentences: Josephus writes of a Jewish sect, whose leader was James the Just (the brother of Jesus). Josephus' history includes sections on John the Baptist, the High Priest Annas, Pontius Pilate, and Jesus called the Messiah.