In the movie, Professor McGonagall explains the origins of the Chamber of Secrets. Who does it in the book?
Professor Binns, the history teacher (who is also a ghost)
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> In the movie, Professor McGonagall explains the origins of the Chamber of Secrets. Who does it in the book? [/INST] Professor Binns, the history teacher (who is also a ghost) </s>