What is the name of the ghost who haunts the Gryffindor common room?
Nearly Headless Nick, also known as Sir Nicholas de Mimsy-Porpington
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> What is the name of the ghost who haunts the Gryffindor common room? [/INST] Nearly Headless Nick, also known as Sir Nicholas de Mimsy-Porpington </s>