Question: The architect who co-designed Steilneset Memorial was born on what date?

Context paragraphs:
George Chakhava: George Chakhava (born 1923) is a Georgian architect, best known for the Bank of Georgia headquarters in Tbilisi, which he co-designed with Zurab Jalaghania.

Steilneset Memorial: The Steilneset Memorial is a monument in Vardø, Norway, commemorating the trial and execution in 1621 of 91 people for witchcraft.  The memorial was designed by artist Louise Bourgeois and architect Peter Zumthor and was opened in 2011.  It was Bourgeois' last major work.

Paul S. Devrouax: Paul S. Devrouax (October 4, 1942 — March 22, 2010) was an African-American architect in Washington, D.C..  He founded the architectural design firm of Devrouax+Purnell, and helped design the Verizon Center, Nationals Park, the Walter E. Washington Convention Center, and the D.C. headquarters of Freddie Mac and Pepco.  He co-designed the African-American Civil War Memorial, and provided design adjustments to the Martin Luther King, Jr.  Memorial.

Anders Hejlsberg: Anders Hejlsberg ( , born 2 December 1960) is a prominent Danish software engineer who co-designed several popular and commercially successful programming languages and development tools.  He was the original author of Turbo Pascal and the chief architect of Delphi.  He currently works for Microsoft as the lead architect of C# and core developer on TypeScript.

Louis Laybourne Smith: Louis Laybourne Smith CMG (1 April 1880 – 13 September 1965) was an architect and educator in South Australia.  Born in the Adelaide inner-southern suburb of Unley, he became interested in engineering and architecture while in the goldfields of Western Australia and later studied mechanical engineering at the School of Mines, serving an apprenticeship under architect Edward Davies.  After graduating he accepted a position as a lecturer at the school, and was responsible for developing the first formal architecture course in the State in 1904.  Between 1905 and 1914, he served as registrar at the school before leaving to join his long-time friend, Walter Bagot, at the architectural firm of Woods, Bagot and Jory.  He remained with the firm until his death in 1965, and over the years was involved in a number of significant projects, including the South Australian National War Memorial and the original Australian Mutual Provident building on King William Street.

List of works by Thomas Lockwood: Thomas Meakin Lockwood (1830–1900) was an English architect whose main works are in and around Chester, Cheshire.  He was born in London, and brought up in East Anglia.  He trained in Chester with T. M. Penson, then established his own independent practice in the city in about 1860.  His most important patron was the First Duke of Westminster.  His sons W. T. and P. H. Lockwood joined him as partners in the practice in 1892.  According to the architectural historian Edward Hubbard he is the only 19th-century Chester architect, other than John Douglas, to have acquired a national reputation.  A memorial window to his memory is in the north aisle of St John the Baptist's Church, Chester.

Peter Zumthor: Peter Zumthor (born 26 April 1943) is a Swiss architect whose work is frequently described as uncompromising and minimalist.  Though managing a relatively small firm, he is the winner of the 2009 Pritzker Prize and 2013 RIBA Royal Gold Medal.

George M. White: George M. White FAIA (November 1, 1920 – June 17, 2011) was an American architect who served as the Architect of the Capitol from January 27, 1971 to November 21, 1995.  He was born in Cleveland, Ohio and attended the Massachusetts Institute of Technology at the age of sixteen.  He graduated with a B.S. and an M.S. in electrical engineering in 1941.  He later received an M.B.A. from Harvard and a J.D. from Case Western Reserve University.  He oversaw the construction of the Library of Congress James Madison Memorial Building and the Hart Senate Office Building, as well as the restoration of the old Supreme Court and Senate chambers.

Isaak Shvartsev: Isaak Sergivich Shvartsev (Russian: Исаак Сергеевич Шварцев ) (born 1949) is a Moldovian Soviet architect, known for his work in Chișinău.  In 1970 he graduated from the Chișinău Construction College, and then Chișinău Polytechnic Institute five years later.  In the 1980s he designed much of the shopping centre and residential quarter in Salgannoy, Chișinău.  He was also the architect of the animated film studio in Chișinău, the Educational Laboratory Complex, and a cinema in Plovdiv, Bulgaria (1986).  In 1976 he won the award of the National competition of architects to design the memorial complex, commemorating the 30th anniversary of the Jassy–Kishinev Offensive.  He later moved to the United States, where he resides in New York City.

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.

Supporting paragraphs: Steilneset Memorial Peter Zumthor
Answer: 26 April 1943