Question: Three Nationwide Plaza is a 408 ft(124m) postmodern highrise building located at the address 3 Nationwide Plaza in Downtown Columbus, Nationwide Plaza is the headquarters of Nationwide Mutual Insurance Company, and affiliated companies, are a group of large U.S. insurance and financial services companies based in Columbus in which US state (acronym)?

full_context: Document 1: One Worldwide Plaza: One Worldwide Plaza is the largest tower of a three-building, mixed-use commercial and residential complex completed in 1989, in the New York City borough of Manhattan, known collectively as Worldwide Plaza. One Worldwide Plaza is a commercial office tower on Eighth Avenue. Two Worldwide Plaza is a residential condominium tower west of the center of the block, and Three Worldwide Plaza is a low-rise condominium residential building with street level stores on Ninth Avenue, to the west of the towers. Skidmore, Owings & Merrill was the designer for the office complex, and the residential complex was designed by Frank Williams. The complex, whose component skyscrapers are among the list of tallest buildings in New York City, occupies an entire city block, bounded by Eighth Avenue, Ninth Avenue, 49th Street, and 50th Street. Located on the west side of Eighth Avenue, One Worldwide Plaza is built on the site of New York City's third Madison Square Garden.
Document 2: Economy of Columbus, Ohio: Columbus, Ohio has a generally strong and diverse economy based on education, insurance, banking, fashion, defense, aviation, food, logistics, steel, energy, medical research, health care, hospitality, retail, and technology. Overall, it was ranked as one of the top 10 best big cities in the country in 2010, according to Relocate America, a real estate research firm. Market Watch ranked Columbus and their metro area as the No. 7 best place in the country to operate a business in 2008. The same year Ohio was ranked No. 5 in the nation for headquarters of Fortune 500 companies, with Columbus home to the most in the state. In 2007, the city was ranked No. 3 in the United States by fDi magazine for "Cities of the Future", and No. 4 for most business-friendly in the country. Columbus was ranked as the seventh strongest economy in the United States in 2006, and the best in Ohio, according to Policom Corp. In 2011 the Columbus metropolitan area's GDP was $94.7 billion, up from $90 billion in 2009, up from $85.5 billion in 2006, $75.43 billion in 2005, and $69.98 billion in 2001.
Document 3: Prudential Headquarters: Prudential Financial, as it is known today, began as The Widows and Orphans Friendly Society in 1875. For a short time it was called the Prudential Friendly Society, and for many years after 1877 it was known as the Prudential Insurance Company of America, a name still widely in use. Based in Newark, New Jersey, the company has constructed a number of buildings to house its headquarters downtown in the Four Corners district. In addition to its own offices, the corporation has financed large projects in the city, including Gateway Center and Prudential Center. Prudential has about 5,200 employees in the city.
Document 4: Columbia Insurance Group: Columbia Mutual Insurance Company is the parent company of a group of five property and casualty insurance companies operating as the Columbia Insurance Group. The group of companies primarily focus on insuring businesses but, also, insure farms, homes and cars. The company is licensed in 30 states, with policyholders in 19 states. Columbia Insurance Group exclusively markets its insurance products through the independent insurance agency system. The corporate headquarters is in Columbia, Missouri. The company has branch offices in Austin, Texas, Atlanta, Georgia, Omaha, Nebraska, and Salina, Kansas.
Document 5: Midland Building: The Midland Building is a 280 ft (85m) tall skyscraper located at 250 East Broad Street, Columbus, Ohio. The office building was completed in 1970 and has 21 floors. Thomas E. Stanley designed the building, which is the 19th tallest in Columbus.
Document 6: Northwestern Mutual: The Northwestern Mutual Life Insurance Company is an American financial services mutual organization based in Milwaukee. The financial security company provides consultation on wealth and asset income protection, education planning, retirement planning, investment advisory services, trust and private client services, estate planning and business planning. Its products include life insurance, disability income, and long-term care insurance; annuities; investments; and investment advisory products and services.
Document 7: Vern Riffe State Office Tower: The Vern Riffe State Office Tower is a 503-foot-tall (153 m) skyscraper in Columbus, Ohio. It was completed in 1988 and has 32 floors. NBBJ designed the building, which is the fifth-tallest in Columbus, and has 102,192 m² of floor area. An earlier concept for the site, also designed by NBBJ, would have included a site to the west of the present location, and would have effectively closed off South Wall Street north of West State Street. The building was named for Vernal G. Riffe, Jr, who served as Speaker of the Ohio House of Representatives from 1975 to 1994. The complex also contains the 854-seat Capitol Theatre.
Document 8: Ohio Mutual Insurance Group: "Ohio Mutual Insurance Group" is a group of property and casualty insurance companies based in Bucyrus, Ohio. The group is composed of three affiliates: Ohio Mutual Insurance Company, United Ohio Insurance Company and Casco Indemnity Company. As a mutual insurance company, Ohio Mutual Insurance Group is not a stock company but one that is mutually owned by its policyholders. A board of directors and an appointed president and chief executive officer manage the company.
Document 9: PNC Center (Cleveland): PNC Center (formerly National City Center) is a skyscraper located in downtown Cleveland, Ohio at the northwest corner of Euclid Avenue and East 9th Street. The building has 35 stories and rises to a height of 410 ft , and was designed by Skidmore, Owings and Merrill. Construction on the building was finished in 1980. It served as the headquarters for the now defunct National City Corporation, and is now the Cleveland-area offices for PNC Financial Services.
Document 10: One Nationwide Plaza: One Nationwide Plaza is a 40-story skyscraper in Columbus, Ohio that serves as the corporate office headquarters of Nationwide Mutual Insurance Company. It is part of the complex of buildings known as Nationwide Plaza.
Document 11: Western Mutual Insurance Group: Western Mutual Insurance Group is an American group of Property and Casualty Insurance companies, made up of Western Mutual Insurance Company, its sister company Residence Mutual Insurance Company, and their jointly owned subsidiary, Arizona Home Insurance Company. Based in Irvine, CA, the group writes direct property and casualty insurance in Arizona, California, Colorado, New Mexico, Nevada, Utah and Texas for preferred homeowners. The Western Mutual Insurance Group has a financial strength rating of 'A+' (Superior) by A.M. Best, a Nationally Recognized Statistical Rating Organization (NRSRO) by the United States Securities and Exchange Commission.
Document 12: American Income Life Insurance Company: American Income Life Insurance Company (formerly NASDAQ: AINC), based in Waco, Texas, provides supplemental life insurance to labor unions, credit unions, and associations. American Income Life (AIL) was founded in 1951. The company's executive offices have been located in Waco, Texas, since 1959. American Income Life is licensed in 49 states, the District of Columbia, Canada, and is registered to carry on business in New Zealand. AIL also has two wholly owned subsidiaries: National Income Life Insurance Company, licensed in the state of New York, and Union Heritage Life Assurance Company Limited, licensed in the Republic of Ireland.
Document 13: Three Nationwide Plaza: Three Nationwide Plaza is a 408 ft(124m) postmodern highrise building located at the address 3 Nationwide Plaza in Downtown Columbus, Ohio. The building is part of the larger multi-building complex known as Nationwide Plaza. Nationwide Plaza is the headquarters of Nationwide Mutual Insurance Company. Three Nationwide Plaza is the 10th tallest building in Columbus. Construction on the building finished in December 1988. The architect responsible was the NBBJ Group and the building design follows a postmodern style. The building was constructed for approximately $89 million and the main materials used were glass, steel, and concrete.
Document 14: Nationwide Mutual Insurance Company: Nationwide Mutual Insurance Company and affiliated companies is a group of large U.S. insurance and financial services companies based in Columbus, OH. The company also operates regional headquarters in Des Moines, IA; San Antonio, TX; Gainesville, FL; Raleigh, NC; and Westerville, OH. Nationwide currently has approximately 31,000 employees, and is ranked #69 in the most recent Fortune 500. Nationwide is currently ranked #71 in Fortune's "100 Best Companies to Work For".
Document 15: Tower at PNC Plaza: The Tower at PNC Plaza is a skyscraper in Pittsburgh, Pennsylvania. It is the corporate headquarters of the PNC Financial Services Group and has approximately 800,000 sqft , standing 33 stories (545 feet) tall. Nearby buildings totaling 37,000 sqft , were purchased by PNC and deconstructed to make space for the Tower at PNC Plaza. The project was estimated to cost $400 million when announced in 2011 (or $ today).
ground_truth: OH