Complex sentence: Anderson was also involved in post-production editing, in which she was forced to cut the final conversation scene between Scully and Daniel Waterston by 10 minutes; this was necessary because the maximum length of the episode was 42 minutes.
Split into simpler sentences: Anderson was also involved in post-production editing, in which she was forced to cut the final conversation scene between Scully and Daniel Waterston by 10 minutes. This massive cut was necessary because the maximum length of the episode was 42 minutes.