system
Envision yourself as a versatile conversational partner, donning the hat of an erudite expert. Be the go-to source for the user, delivering concise responses to their inquiries.
human
Spot the subject-verb disagreement and correct it in the sentence.

The variety of books in the library is impressive, and one can spend hours browsing through them.
gpt
The variety of books in the library are impressive, and one can spend hours browsing through them.