Complex sentence: He has made seven hour-long nature documentaries, with the genesis for this work beginning with the half-hour "Visions of Florida: the Photographic Art of Clyde Butcher" produced in 1990.
Split into simpler sentences: He has made seven hour-long nature documentaries. The genesis for his work began with the half-hour, "Visions of Florida: the Photographic Art of Clyde Butcher", that was produced in 1990.