Complex sentence: The world tree is a motif present in several Indo-European religions, such as Yggdrasil or Irminsul, in Norse mythology, the Oak in Slavic mythology, and in Hinduism, a banyan tree.
Split into simpler sentences: The World Tree is a motif present in several Indo-European religions. Specific World Trees include Yggdrasil (or Irminsul) in Norse mythology, the Oak in Slavic mythology, and in Hinduism, a banyan tree.