Complex sentence: The screenplay then went through various drafts written by Alcott, Jon Cohen, Becky Johnston, and Philip Levens and by August 2003, Levens was replaced by screenwriter Laeta Kalogridis.
Split into simpler sentences: The screenplay then went through various drafts written by Alcott, Jon Cohen, Becky Johnston, and Philip Levens. By August 2003, Levens was replaced by screenwriter Laeta Kalogridis.