Complex sentence: He found old staging notes and ballet notation from Petipa's original production and deciphered them to bring the ballet back to life.Ot has since become a regular part of the Bolshoi's repertory.
Split into simpler sentences: He found old staging notes and ballet notation from Petipa's original production and deciphered them to bring the ballet back to life. It has since become a regular part of the Bolshoi's repertory.