Q:Information: - Western Geophysical was a company founded in California in 1933 by Henry Salvatori for the purpose of using reflection seismology to explore for petroleum. - Named after inventor Charles Litton, Sr., Litton Industries was a large defense contractor in the United States, bought by the Northrop Grumman Corporation in 2001. - Dallas is a major city in the state of Texas and is the largest urban center of the fourth most populous metropolitan area in the United States. The city proper ranks ninth in the U.S. and third in Texas after Houston and San Antonio. The city's prominence arose from its historical importance as a center for the oil and cotton industries, and its position along numerous railroad lines. The bulk of the city is in Dallas County, of which it is the county seat; however, sections of the city are located in Collin, Denton, Kaufman, and Rockwall counties. According to the 2010 United States Census, the city had a population of 1,197,816. The United States Census Bureau's estimate for the city's population increased to 1,300,092 as of July 1, 2015. - Addison is an incorporated town in Dallas County, Texas, in the United States. Addison is situated to the immediate north of the city of Dallas. The town's population was 13,056 at the 2010 census. Addison and Flower Mound were the only two Texas towns with a population greater than 10,000 in the 2010 census; since then the towns of Prosper and Trophy Club have also exceeded 10,000 in population estimates. Addison is best-known within the Dallas-Fort Worth Metroplex region for its abundance of restaurants and nightlife. - Petroleum (from : "rock" + "oleum": "oil". ) is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface, which is commonly refined into various types of fuels. Components of petroleum are separated using a technique called fractional distillation. - Western Atlas was formed in 1987 through the merger of Western Geophysical ( owned by Litton Industries ) and Dresser Atlas . The resulting company was a joint venture of Litton and Dresser Industries until it was spun off as a publicly traded company in 1994 . In 1998 , Western Atlas was acquired by Baker Hughes . Western Atlas wireline division , Western Atlas Logging Services , became Baker Atlas , one of seven divisions of Baker Hughes . The Western Geophysical division of Western Atlas was joined with Schlumberger geophysical operations , Geco - Prakla , to form WesternGeco in 2000 . WesternGeco was initially owned jointly by Baker Hughes and Schlumberger . In 2006 Schlumberger bought Baker Hughes ' interest in WesternGeco . This company went from Atlas Wireline to Western Atlas then to Baker Atlas . - A multinational corporation"" or worldwide Enterprise is a corporate organization that owns or controls production of goods or services in one or more countries other than their home country. It can also be referred as an international corporation, a transnational corporation, or a stateless corporation. - General Electric, often abbreviated as GE, is an American multinational conglomerate corporation incorporated in New York, and headquartered in Boston, Massachusetts. As of 2016, the company operates through the following segments: Power & Water, Oil and Gas, Aviation, Healthcare, Transportation and Capital which cater to the needs of Financial services, Medical devices, Life Sciences, Pharmaceutical, Automotive, Software Development and Engineering industries. - Texas is the second largest state in the United States by both area and population. Geographically located in the south central part of the country, Texas shares borders with the U.S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo Leon, and Tamaulipas to the southwest, while the Gulf of Mexico is to the southeast. - The Halliburton Company, an American multinational corporation, is one of the world's largest oil field service companies, with operations in more than 80 countries. It owns hundreds of subsidiaries, affiliates, branches, brands, and divisions worldwide and employs approximately 70,000 people. - Dresser Industries was a multinational corporation headquartered in Dallas, Texas, United States, which provided a wide range of technology, products, and services used for developing energy and natural resources. In 1998, Dresser merged with its main rival Halliburton, Halliburton sold many of former Dresser non "oil patch" divisions, retaining the M W Kellogg Engineering and Construction Company and the Dresser oil-patch products and services that complemented Halliburton's energy and natural resource businesses. In 2001 Halliburton sold five separate, but somewhat related former Dresser non "oil patch" divisions, to an investment banking firm. Those five operations later took the name "Dresser Inc." In October 2010, Dresser Inc., was acquired by General Electric. It is headquartered in Addison, Texas. - Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves. The method requires a controlled seismic source of energy, such as dynamite/Tovex, a specialized air gun or a seismic vibrator, commonly known by the trademark name Vibroseis. Reflection seismology is similar to sonar and echolocation. This article is about surface seismic surveys; for vertical seismic profiles, see VSP. Outline of the method. Seismic waves are mechanical perturbations that travel in the Earth at a speed governed by the acoustic impedance of the medium in which they are travelling. The acoustic (or seismic) impedance, "Z", is defined by the equation: - California is the most populous state in the United States and the third most extensive by area. Located on the western (Pacific Ocean) coast of the U.S., California is bordered by the other U.S. states of Oregon, Nevada, and Arizona and shares an international border with the Mexican state of Baja California. The state capital is Sacramento. Los Angeles is California's most populous city, and the country's second largest after New York City. The state also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County. - Dresser Atlas is an American provider of oil field and factory automation services, formed in 1968 through the merger of Pan Geo Atlas Corporation and Lane Wells Company. In 1987, the company merged with Western Geophysical to form Western Atlas, and in 1998, Western Atlas was acquired by Baker Hughes, and, since then, was named Baker Atlas. - Henry Salvatori (March 28, 1901 July 7, 1997) was an American geophysicist, businessman, philanthropist, and political activist. After reading the paragraphs above, we are interested in knowing the entity with which 'western atlas' exhibits the relationship of 'instance of'. Find the answer from the choices below. Choices: - area - article - atlas - border - capital - census - city - club - company - conglomerate - corporation - country - county - defense contractor - energy - enterprise - factory - field - gas - gulf - joint venture - july - liquid - march - method - metropolitan - metropolitan area - mound - multinational corporation - name - nation - oil field - organization - outline - people - population - position - range - region - rock - software - software development - state - town - travel - trophy - united states census
A:
oil field