Complex sentence: The concept was developed in 1957 by Frances Kipps Spencer, a member of the Ascension Lutheran Church in Danville, Virginia, when she set out to create decorations appropriate for a church's Christmas celebrations.
Split into simpler sentences: The concept was developed by Frances Kipps Spencer, a member of the Ascension Lutheran Church in Danville, Virginia. She originated the concept in 1957 when she set out to create decorations appropriate for a church's Christmas celebrations.