Question: How many structures designed by the Tonkens House architect were completed?

Context paragraphs:
George Draser Jr. Houses: The George Draser Jr.  Houses are a pair of neighboring houses located at 48 and 52 W. Main St. in Mascoutah, Illinois.  The houses are both Queen Anne structures designed and built by local architect George Draser Jr.  The house at 48 W. Main St. is a one-story cottage known locally as the Doll House due to its size.  The house's design features gables with patterned shingles and decorative spindlework at the porch frieze and the peak of the gables.  The house at 52 W. Main St. is a full-size house which Draser built for himself and his family.  The house features a tower topped by a finial at its northeast corner, a large gable on its rear facade, and a hipped roof with cross gables and a small dormer.  The entrance to the house is located within a porch supported by Ionic columns; a pediment tops the porch above the doorway.

Gerald B. and Beverley Tonkens House: The Gerald B. and Beverley Tonkens House, also known as the Tonkens House, is a single story private residence, designed by American architect Frank Lloyd Wright in 1954.  The house was commissioned by Gerald B. Tonkens (an automobile dealer) and his first wife Rosalie.  It is located in Amberley Village, a village in Hamilton County, Ohio.

Hyperboloid structure: Hyperboloid structures are architectural structures designed using a hyperboloid in one sheet.  Often these are tall structures such as towers where the hyperboloid geometry's structural strength is used to support an object high off the ground, but hyperboloid geometry is also often used for decorative effect as well as structural economy.  The first hyperboloid structures were built by Russian engineer Vladimir Shukhov (1853–1939).  The world's first hyperboloid tower is located in Polibino, Dankovsky District, Lipetsk Oblast, Russia.

List of works by Eero Saarinen: This is a list of houses, commercial buildings, educational facilities, furniture designs, and other structures designed by architect Eero Saarinen.  Many of Saarinen's early designs were in collaboration with his father Eliel Saarinen.

Theodore A. Pappas House: The Theodore A. Pappas House is a Frank Lloyd Wright designed Usonian house in St. Louis, Missouri.  The Pappas house was listed on the National Register of Historic Places in 1979, when it was only 15 years old.  It is one of two houses in St. Louis designed by Wright, the only Usonian Automatic in Missouri.  Wright designed it between 1955 and 1959 at the Pappas’ request, and Theodore and Bette Pappas built the house together with the help of day laborers between 1960 and 1964.  The Pappas house is a rambling four-bedroom house, and after the Gerald B. and Beverley Tonkens House, is the largest of the Usonian Automatics built.

New Hampshire Apartments: The New Hampshire Apartments in Grand Forks, North Dakota were listed on the National Register of Historic Places in 1982.  They were built in 1904 at a cost of $26,000 and were significant as a building designed by architect Joseph Bell DeRemer.  The apartments were an example of commercial vernacular architecture, and the building was the first in Grand Forks to have a planned second-story-level walkway to another building (the Security Building).  When listed on the National Register, the apartment complex was one of few remaining downtown structures designed by DeRemer with classical details.  It was built by the Dinnie Brothers, a construction firm that was established in 1881 and was at one time responsible for the building of more than 60 percent of the commercial buildings in Grand Forks.

High strain composite structure: High Strain Composite Structures (HSC Structures) are a class of composite material structures designed to perform in a high deformation setting.  High strain composite structures transition from one shape to another upon the application of external forces.  A single HSC Structure component is designed to transition between at least two, but often more, dramatically different shapes.  At least one of the shapes is designed to function as a structure which can support external loads.

Chitra Vishwanath: Chitra Vishwanath is an Indian architect based in Bengaluru who works on themes related to ecology and architecture.  She has been running her own architectural firm since 1991, working with other architects on many projects in India and Africa.  She is now the Principal Architect and Managing Director of BIOME Environment Solutions Private Limited, which has 30 employees.  She has been involved in more than 500 projects encompassing construction of buildings of all sizes and water harvesting and sanitation structures with specific relevance to the ecology of the sites.  With mud as a basic material input in construction she has designed and built many structures.

Nathan C. Wyeth: Nathan Corwith Wyeth (April 20, 1870 – August 30, 1963) was an American architect.  He is best known for designing the West Wing of the White House, creating the first Oval Office.  He designed a large number of structures in Washington, D.C., including the Francis Scott Key Bridge over the Potomac River, the USS Maine Mast Memorial, the D.C. Armory, the Tidal Basin Inlet Bridge, many structures that comprise Judiciary Square, and numerous private homes—many of which now serve as embassies.  He also co-designed the Cannon House Office Building, the Russell Senate Office Building, the Longworth House Office Building, and an addition to the Russell Senate Office Building.

Frank Lloyd Wright: Frank Lloyd Wright (born Frank Lincoln Wright, June 8, 1867 – April 9, 1959) was a first generation Welsh-American architect, interior designer, writer and educator, who designed more than 1,000 structures, 532 of which were completed.  Wright believed in designing structures that were in harmony with humanity and its environment, a philosophy he called organic architecture.  This philosophy was best exemplified by the Fallingwater house (1935), which has been called "the best all-time work of American architecture".

Supporting paragraphs: Gerald B. and Beverley Tonkens House Frank Lloyd Wright
Answer: 532