Original sentence: On returning to the company, he was promoted to the rank of Principal Dancer, partnering many of the leading British ballerinas of the 20th Century, including Dame Beryl Grey, Dame Margot Fonteyn and Svetlana Beriosova
Edited sentence: On returning to the company, he was promoted to the rank of Principal Dancer, partnering many of the leading British ballerinas of the 20th century, including Dame Beryl Grey, Dame Margot Fonteyn and Svetlana Beriosova