Complex sentence: He has traveled extensively in Central Asia and Southern Asia, researching Zoroastrianism, and writes extensively on a range of topics including Gnostic Dualism, the Cathars of the Languedoc, the Counts of Toulouse, Occitania and heraldry.
Split into simpler sentences: He has traveled extensively in Central Asia and Southern Asia, researching Zoroastrianism. He writes extensively on a range of topics including Gnostic Dualism, the Cathars of the Languedoc, the Counts of Toulouse, Occitania and heraldry.