Complex sentence: In 2015, Nolan wrote a 76-page screenplay--about half the length of his usual scripts, and his shortest to date--with a precise structure that necessitated fictional characters, rather than ones based on eyewitnesses.
Split into simpler sentences: In 2015, Nolan wrote a 76-page screenplay, which was about half the length of his usual scripts, and his shortest to date. Its precise structure necessitated fictional characters, rather than ones based on eyewitnesses.