Complex sentence: The Green Lama is an alias of Jethro Dumont, a rich resident of New York City who spent ten years in Tibet studying to be a lama (a Buddhist Spiritual Teacher) and learning many mystical secrets in the process.
Split into simpler sentences: The Green Lama is an alias of Jethro Dumont, a rich resident of New York City. Spent ten years in Tibet studying to be a lama (a Buddhist Spiritual Teacher) and learning many mystical secrets in the process.