Original sentence: In 1955, Hauge won the Gyldendal's Endowment , a literature prize which was awarded by the Norwegian publisher Gyldendal Norsk Forlag.The opera was first performed on September 3, 1973 by The Norwegian Opera and Ballet (Norwegian:Den Norske Opera & Ballet) in Oslo
Edited sentence: In 1955, Hauge won the Gyldendal's Endowment, a literature prize which was awarded by the Norwegian publisher Gyldendal Norsk Forlag.The opera was first performed on September 3, 1973 by The Norwegian Opera and Ballet (Norwegian: Den Norske Opera & Ballet) in Oslo