Original sentence: The first version, a part-talkie released in 1929 while the show was still playing, was not really based on the show, but on the Edna Ferber novel that inspired the musical, and was very, very different from the musical
Edited sentence: The first version, a part-talkie released in 1929 while the show was still playing, was not really based on the show, but on the Edna Ferber novel that inspired the musical, and was very, very different from the show