Complex sentence: Anderson later stated that, because many of the lines were written in a tongue-in-cheek style, she and David Duchovny said them in a humorous style; the two had to keep reminding themselves that the story revolved around a murder.
Split into simpler sentences: Anderson later stated that, because many of the lines were written in a tongue-in-cheek style, that she and David Duchovny said them in a humorous style. The two had to keep reminding themselves that the story revolved around a murder.