Complex sentence: The Nestor Motion Picture Company or Nestor Film Company was a motion picture studio and production company located in Bayonne, New Jersey, and Hollywood, California, which was owned and operated by David Horsley and his brother, William Horsley.
Split into simpler sentences: The Nestor Motion Picture Company or Nestor Film Company was a motion picture studio and production company located in Bayonne, New Jersey, and Hollywood, California. Nestor was owned and operated by David Horsley and his brother, William Horsley.