Original sentence: He took part in the climactic battle at the end of the movie, and also played a key role in it after becoming General.Throughout the mid-part of the movie, Jar Jar spends his time behaving in the manner of slapstick comedy
Edited sentence: He also played a key role in it after becoming General.Jar Jar took part in the climactic battle at the end of the movie.Throughout the mid-part of the movie, Jar Jar spends his time screwing up in what was presumably supposed to be slapstick comedy