Question: The company that owns the Brent field is headquartered in what country?

Context articles: SOCAR
Berkshire Hathaway
Sahara India Pariwar
Royal Dutch Shell
ITC Transmission
Brent oilfield
Săcel oil field
Sinclair Broadcast Group
R.J. Corman Railroad Group
Ukrtatnafta

The State Oil Company of Azerbaijan Republic (SOCAR) (Azerbaijani: "Azərbaycan Respublikası Dövlət Neft Şirkəti" ) is a wholly state-owned national oil and gas company headquartered in Baku, Azerbaijan.
 The company produces oil and natural gas from onshore and offshore fields in the Azerbaijani section of the Caspian Sea.
 It operates the country's two oil refineries, one gas processing plant and runs several oil and gas export pipelines throughout the country.
 It owns fuel filling stations under the "SOCAR" brand in Azerbaijan, Georgia, Ukraine, Romania and Switzerland.
 The company has about 70,000 employees.
Berkshire Hathaway Inc. is an American multinational conglomerate holding company headquartered in Omaha, Nebraska, United States.
 The company wholly owns GEICO, Long & Foster, BNSF Railway, Lubrizol, Fruit of the Loom, Helzberg Diamonds, FlightSafety International, Pampered Chef, and NetJets, and also owns 26.7% of the Kraft Heinz Company, and significant minority holdings in American Express (17.15%), The Coca-Cola Company (9.4%), Wells Fargo (9.9%), IBM (6.9%) and Apple (2.5%).
 Since 2016, the company has acquired large holdings in the major US airline carriers and is currently the largest shareholder in United Airlines and Delta Air Lines and a top 3 shareholder in Southwest Airlines and American Airlines.
 Berkshire Hathaway has averaged an annual growth in book value of 19.0% to its shareholders since 1965 (compared to 9.7% from the S&P 500 with dividends included for the same period), while employing large amounts of capital, and minimal debt.
Sahara India Pariwar is an Indian conglomerate headquartered in Lucknow, India with business interests in finance, infrastructure & housing, media & entertainment, consumer merchandise retail venture, manufacturing and information technology.
 The company has an estimated market capitalisation of 25.94 billion as of March 2011.
 The group is a major promoter of sports in India and was the main sponsor of the India national cricket team.
 The company owns a 42.5% stake in Formula One's Force India Formula 1 Team and also sponsors the India national field hockey team.
 In more recent times, the company has faced criticism due to allegations regarding questionable financial practices, crony capitalism and its close nexus with and favoritism from political parties.
Royal Dutch Shell plc (, ), commonly known as Shell, is a British–Dutch multinational oil and gas company headquartered in the Netherlands and incorporated in the United Kingdom.
 It is one of the six oil and gas "supermajors" and the sixth-largest company in the world measured by 2016 revenues (and the largest based in Europe).
 Shell was first in the 2013 Fortune Global 500 list of the world's largest companies; in that year its revenues were equivalent to 84% of the Netherlands' $556 billion GDP.
ITC Transmission was founded in 1999 as International Transmission Co., a subsidiary of Detroit Edison (since renamed DTE Energy Electric Company, itself a subsidiary of DTE Energy), charged in the ownership, operation and maintenance of Detroit Edison's transmission system.
 In 2003, DTE sold the subsidiary to ITC Holdings Corp.
 In 2004, ITC Transmission became the first, fully independent electricity transmission company in the United States following the 2003 transfer of ownership from DTE Energy to ITC Transmission’s parent company, ITC Holdings Corp.
 ITC Transmission owns a fully regulated, high-voltage system that transmits electricity to local electricity distribution facilities.
 ITC Holdings Corp. () became a publicly traded company in 2005 and is headquartered in Novi, Michigan.
 Today it owns transmission systems in several states under a unique independent business model.
The Brent field is an oil and gas field located in the East Shetland Basin of the North Sea, 186 km north-east of Lerwick, Shetland Islands, Scotland, at the water depth of 140 m .
 The field operated by Shell UK Limited was once one of the most productive parts of the UK's offshore assets but has reached the stage where production is no longer economically viable.
 Decommissioning of the Brent field will be conducted over the coming decade.
The Săcel oil field is an oil field located in Săcel, Maramureș County.
 It was discovered in 1990 and developed by Petrom but the company abandoned the project in 2007 when it was bought by Brent Oil.
 It began production in 1991 and produces oil.
 The total proven reserves of the Săcel oil field are around 10 million barrels (1.3×10tonnes), and production centered on 800 oilbbl/d .
Sinclair Broadcast Group is an American telecommunications company that is owned by the family of company founder Julian Sinclair Smith.
 Headquartered in Hunt Valley, Maryland, the company is the second-largest television station operator in the United States (behind Nexstar Media Group) by number of stations, and largest by total coverage; owning and/or operating a total of 173 stations across the country (233 after all currently proposed sales are approved) in over 100 markets (covering 40% of American households), many of which are located in the South and Midwest.
 Sinclair also owns four digital multicast networks (Comet, Charge!
, Stadium, and TBD) and one cable network (Tennis Channel), and owns or operates four radio stations (all based in the Pacific Northwest region).
 Among other non-broadcast properties, Sinclair also owns the professional wrestling promotion Ring of Honor.
R.J. Corman Railroad Group, LLC is a privately owned railroad services and short line operating company headquartered in Nicholasville, KY, with field locations in 23 states.
 It was owned by Richard J. Corman, who established the company in 1973, and ran it until his death on August 23, 2013.
 The company owns eleven short-line railroads spanning Indiana, Kentucky, Mississippi, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, and West Virginia.
 The company serves all seven Class I railroads, many regional and short line railroads as well as various rail-served industries.
 These operations encompass an array of services, including: railroad construction, short line railroad operations, dispatch, industrial switching services, emergency response, track material logistics, distribution centers, signal design and construction, building eco-friendly locomotives, railroad worker training and an excursion dinner train.
Ukrtatnafta is an international oil refining company based in Kremenchuk and founded in 1994.
 It is one of the largest producer of oil products in the country.
 The company operates the largest oil refinery in the country located in Kremenchuk with a capacity of 368500 oilbbl/d and several petrol stations.
 Ukrainian state-owned energy company Naftohaz Ukrainy owns 43.1% of shares in Ukrtatnafta, Tatneft owns 8.6% and the government of Tatarstan owns 28.8%.