Complex sentence: For decades also the band chourus and orcastra preform in a spring cocert where in 2011 the advanced orcastra gave one of the best hindley preformances ever, the Hindley Happening, a small fair, has been held each spring on the school grounds.
Split into simpler sentences: For decades also the band chourus and orchestra perform in a spring concert where in 2011 the advanced orchestra gave one of the best Hindley performances ever. The Hindley Happening, a small fair, has been held each spring on the school grounds.