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 "Leona Helmsley"): Leona Mindy Roberts Helmsley (born Lena Mindy Rosenthal; July 4, 1920 – August 20, 2007) was an American businesswoman.
Relevant evidence: No