Complex sentence: Upon their arrival, the students were presented with a blank channel and told his students of the true nature of the movement as an experiment in fascism, presenting the students with a short film discussing the actions of Nazi Germany.
Split into simpler sentences: Upon their arrival, the students were presented with a blank channel. Jones told his students of the true nature of the movement as an experiment in fascism, and presented to them a short film discussing the actions of Nazi Germany.