Complex sentence: Publication of books such as "The Roswell Incident" by Berlitz and Moore in 1980, television shows and other media coverage perpetuated the UFO crash story and cover-up conspiracy beliefs that typically mirror public sentiments towards the US government and oscillate along with those attitudes.
Split into simpler sentences: Publication of books such as "The Roswell Incident" by Berlitz and Moore in 1980, television shows and other media coverage perpetuated the UFO crash story and cover-up conspiracy beliefs. Conspiracy beliefs typically mirror public sentiments towards the US government and oscillate along with those attitudes.