Complex sentence: The Cowboy has recorded a number of songs since "Paralyzed", "I Took A Trip On A Gemini Spaceship" of them being covered by David Bowie on his "Heathen" album.
Split into simpler sentences: The Cowboy has recorded a number of songs since "Paralyzed". For example, "I Took A Trip On A Gemini Spaceship" was covered by David Bowie on his "Heathen" album.