Which Ghost haunts the Girls' Bathroom at Hogwarts?
"Moaning" Myrtle Warren
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> Which Ghost haunts the Girls' Bathroom at Hogwarts? [/INST] "Moaning" Myrtle Warren </s>