Complex sentence: There are many religious organizations that are classified as a Swedenborgian Church, i.e. New Christian churches which understand the Bible in the light of writings of the 18th century theologian Emanuel Swedenborg.
Split into simpler sentences: There are many religious organizations that are classified as a Swedenborgian Church. These organizations are the New Christian churches who understand the Bible in the light of the 18th century theological writings of Emanuel Swedenborg.