Simplify the following text for a Grade 7 native English-speaking person.
Original: He sang the part of the Emperor Altoum in Puccini 's Turandot in 14 performances there .
Simplified: He debuted as the Emperor Altoum in Puccini 's Turandot on 12 March 1987 at the age of 84 . He repeated the role the following season for a total of 14 performances .