Complex sentence: The Tux penguins are sent to a theater with a marquis reading Red State Theater, which is showing "X-Men III", which has drawn a large cheering crowd of moviegoers shown in sillhouette.
Split into simpler sentences: The Tux penguins are sent to a theater with a marquis reading "Red State Theater", which is showing "X-Men III". The movie draws a large cheering crowd of moviegoers shown in sillhouette.