What is the name of Gryffindor's ghost?
Sir Nicholas de Mimsy-Porpington, also known as Nearly Headless Nick.
<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 Gryffindor's ghost? [/INST] Sir Nicholas de Mimsy-Porpington, also known as Nearly Headless Nick. </s>