Complex sentence: Milner learned about spiritual labyrinths from canon rector Lauren Artess of Grace Cathedral in San Francisco, who built the first one in the United States and subsequently built one for the Chrysalis Groups's walks.
Split into simpler sentences: Milner learned about spiritual labyrinths from canon rector Lauren Artess of Grace Cathedral in San Francisco, who built the first one in the United States. Milner subsequently built one for the Chrysalis Groups's walks.