Complex sentence: The planet was hidden behind a space vortex, and was settled by pacifist Autobots and they were led by Autobot triple changer Sandstorm seeking to escape the wars that plagued Cybertron.
Split into simpler sentences: The planet was hidden behind a space vortex, and was settled by pacifist Autobots who were led by Sandstorm. They were seeking to escape the wars that plagued Cybertron.