Question: Frank Ellis Boynton worked at a tourist attraction that stands today as one of the most prominent remaining examples of what?
Sentence (from "Biltmore Estate"): Biltmore House, the main residence, is a Châteauesque-style mansion built by George Washington Vanderbilt II between 1889 and 1895 and is the largest privately owned house in the United States, at 178926 sqft of floor space (135280 sqft of living area).
Relevant evidence: No