Complex sentence: A vile vortex is any of twelve areas arranged in a pattern around the Earth identified by Ivan T. Sanderson who coined the term, ireferring to them as the sites of unexplained disappearances and other mysterious phenomena.
Split into simpler sentences: A vile vortex is any of twelve particular geographic areas, arranged in a pattern around the Earth. The term was coined by Ivan T. Sanderson, who cataloged them as the sites of unexplained disappearances and other mysterious phenomena.