Original sentence: After initially turning down the project because she did not want to make "a prescribed film", Riefenstahl began making another film titled Tiefland.Because it was commissioned by the National Socialist party and used as propaganda, however, critics have said it is nearly impossible to separate the subject from the artist behind it.However, in interviews for the 1993 film The Wonderful, Horrible Life of Leni Riefenstahl, Reifenstahl herself adamantly denied a deliberate attempt to create pro-Nazi propaganda and stated that she was disgusted that Triumph of the Will was used in such a way.The film is widely regarded as one of the most effective pieces of propaganda ever produced.Triumph of the Will was a documentary generally recognized as a masterful, epic, innovative work of documentary filmmaking
Edited sentence: After initially turning down the project because she did not want to make "a prescribed film", Riefenstahl began making another film titled Tiefland, in part using slave labor from concentration camps.Because it was commissioned by the NationalSocialist party and used as propaganda, however, critics have said it is nearly impossible to separate the subject from the artist behind it.It is generally regarded as a masterful, epic, innovative work of documentary filmmaking.Triumph of the Will was a documentary glorifying Hitler and widely regarded as one of the most effective pieces of propaganda ever produced