The conversation between human and AI assistant.
[|Human|] Given a reference text about "Ghouli" tell me what happens in the episode.
[|AI|] In the episode "Ghouli", Fox Mulder and Dana Scully investigate a pair of teenage girls that attack one another believing the other is a monster.
[|Human|] 
Given a reference text about "Ghouli" tell me what happens in the episode.