What great comment did Averroes make?

I believe "The Great Comment" refers to one of Averroes' works, though I don't know which one. He was known as "The Commentator" for Aristotle, or simply one who relays the information from Aristotle to other people. I don't think Dante in Inferno was saying that he was quoted as saying something profound, just that he was the author of a text that was a great commentary on Aristotle's philosophy.

Don't quote me on this, I gathered all of that from scanning the wikipedia page of Averroes.