What is the name of the Defense Against the Dark Arts teacher in 'Harry Potter and the Philosopher's Stone'?
Professor Quirinus Quirrell
<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 Defense Against the Dark Arts teacher in 'Harry Potter and the Philosopher's Stone'? [/INST] Professor Quirinus Quirrell </s>