Complex sentence: Band Camp when Matt Stifler plays a prank on the school band, Sherman who is now the school's guidance counselor decides that a worthwhile punishment would be for Stifler to attend band camp.
Split into simpler sentences: Band Camp when Matt Stifler plays a prank on the school band. Sherman, who is now the school's guidance counselor, decides that a worthwhile punishment would be for Stifler to attend band camp.