Question: How much was the asking price of a private mansion located at 521 Round Hill Road in Greenwich, sold to a businesswoman known for her flamboyant personality and had a reputation for tyrannical behavior that earned her the sobriquet Queen of Mean?
Sentence (from "Dunnellen Hall"): Dunnellen Hall is a private mansion located at 521 Round Hill Road in Greenwich, Connecticut, USA.
Relevant evidence: No