I'm interested in the architect Frank Lloyd Wright. Can you find his 'Fallingwater' building on the site? Once you've found it, tell me its primary architectural style, at least two key materials used in its construction, and one unique or defining characteristic mentioned in its description.
Navigate to 'http://greatbuildings.com/'. Use the search bar to search for 'Frank Lloyd Wright'. From the search results, navigate to the detail page for 'Fallingwater' (also known as 'Edgar J. Kaufmann House'). On the Fallingwater detail page, locate and extract the primary architectural style. Identify and extract at least two key materials used in its construction. Read the description to find and extract one unique or defining characteristic of the building. Synthesize the architectural style, two key materials, and the unique characteristic into a concise answer.
The agent successfully navigates to 'http://greatbuildings.com/'. The agent successfully uses the search function to find 'Frank Lloyd Wright'. The agent navigates to the detail page for 'Fallingwater'. The primary architectural style is stated as 'Modern' or 'Organic Architecture'. At least two key materials are identified (e.g., 'reinforced concrete', 'stone', 'glass', 'steel'). One unique or defining characteristic is identified (e.g., 'built over a waterfall', 'cantilevered terraces', 'integration with nature', 'use of local materials').