Question: In what city is this American chemical conglomerate based that is responsible for the building of the Grace and Thomaston Buildings?
Context: Herbert Henry Dow (February 26, 1866 – October 15, 1930) was an American chemical industrialist, best known as the founder of the American multinational conglomerate Dow Chemical.  He was a graduate of Case School of Applied Science in Cleveland, Ohio.  He was a prolific inventor of chemical processes, compounds, and products, and was a successful businessman. The Heroes of Chemistry is an award given annually by the American Chemical Society.  It highlights teams responsible for creation of innovative and impactful products based on chemistry and chemical engineering and is intended to show how human welfare is improved by industrial chemical scientists and their companies. W.R. Grace and Company is an American chemical conglomerate based in Columbia, Maryland.  Grace is divided into three business segments—Grace Catalysts Technologies, Grace Materials Technologies, and Grace Construction Products.  Grace is a specialty chemicals and materials company.  It has more than 6,700 employees in nearly 40 countries, and annual sales of more than US $ 2.5 billion.  The company's stock, listed in 1953, trades on the New York Stock Exchange. William Henry Nichols (1852–1930) was an American chemist and businessman.  He was instrumental in building the chemical supply business in the U.S.  The specialty materials business of Honeywell traces its roots back a small sulfuric acid company he started in 1870.  Nichols was one of the original founders of the American Chemical Society, serving as president in 1918 and 1919.  The New York branch of the society gives a prestigious award every year that is named after him, the William H. Nichols Medal Award.  He attended New York University. Velsicol Chemical Corporation is an American chemical company based in Rosemont, Illinois that specializes in chemical intermediates for applications such as agrochemicals.  It was founded in 1931 by Joseph Regenstein and Julius Hyman. Neal R. Amundson (January 10, 1916February 16, 2011) was an American chemical engineer.  He was the Chair of the Department of Chemical Engineering at the University of Minnesota for over 25 years.  Later, he was the Cullen Professor of Chemical & Biomolecular Engineering and Mathematics at the University of Houston.  Amundson was considered one of the most prominent chemical engineering educators and researchers in the United States.  .  The Chemical Engineering and Materials Science building at the University of Minnesota-Twin Cities bears his name. The List of American Chemical Society national awards attempts to include national awards, medals and prized offered by the American Chemical Society (ACS).  The ACS national awards program began in 1922 with the establishment of the Priestley Medal, the highest award offered by the ACS.  As of 2016, the ACS offers a 64 national awards, medals and prizes based on scientific and professional contributions in chemistry.  A Grace and Thomaston Buildings are two historic commercial buildings located at Great Neck Plaza in Nassau County, New York.  The Grace Building was built in 1914 and the Thomaston Building in 1926.  They were both built by the W. R. Grace and Company. Uni-President Enterprises Corporation () () is an international food conglomerate based in Tainan, Taiwan.  It is the largest food production company in Taiwan as well as Asia, and has a significant market share in dairy product, foods and snacks, and beverages markets.  It is also responsible for running Starbucks, 7-Eleven, Mister Donut and Carrefour in Taiwan.  In addition, Uni-President also has subsidiaries in Mainland China and Thailand. Irving Langmuir (January 31, 1881 – August 16, 1957) was an American chemist and physicist.  His most noted publication was the famous 1919 article "The Arrangement of Electrons in Atoms and Molecules" in which, building on Gilbert N. Lewis's cubical atom theory and Walther Kossel's chemical bonding theory, he outlined his "concentric theory of atomic structure".  Langmuir became embroiled in a priority dispute with Lewis over this work; Langmuir's presentation skills were largely responsible for the popularization of the theory, although the credit for the theory itself belongs mostly to Lewis.  While at General Electric from 1909 to 1950, Langmuir advanced several basic fields of physics and chemistry, invented the gas-filled incandescent lamp and the hydrogen welding technique, and was awarded the 1932 Nobel Prize in Chemistry for his work in surface chemistry.  The Langmuir Laboratory for Atmospheric Research near Socorro, New Mexico, was named in his honor, as was the American Chemical Society journal for surface science called "Langmuir".
Answer: Columbia, Maryland