Input (grade 11): In the same year, the famous Russian bass Feodor Chaliapin and Serge Diaghilev's Ballets Russes with conductor Ernest Ansermet are guest performers.
Output (grade 11): In the same year, the famous Russian bass Feodor Chaliapin and Serge Diaghilev's Ballets Russes with conductor Ernest Ansermet were guest performers.