Please answer the following question: Information: - A petroleum geologist is an earth scientist who works in the field of petroleum geology, which involves all aspects of oil discovery and production. Petroleum geologists are usually linked to the actual discovery of oil and the identification of possible oil deposits or leads. It can be a very labor-intensive task involving several different fields of science and elaborate equipment. Petroleum geologists look at the structural and sedimentary aspects of the stratum/strata to identify possible oil traps. - Belgorod Oblast ("Belgorodskaya oblast") is a federal subject of Russia (an oblast). Its administrative center is the city of Belgorod. Population: 1,532,526 (2010 Census results). - An urban area is a human settlement with high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities, towns, conurbations or suburbs. In urbanism, the term contrasts to rural areas such as villages and hamlets and in urban sociology or urban anthropology it contrasts with natural environment. The creation of early predecessors of urban areas during the urban revolution led to the creation of human civilization with modern urban planning, which along with other human activities such as exploitation of natural resources leads to human impact on the environment. - Moscow (or ) is the capital and most populous city of Russia, with 12.2 million residents within the city limits and 16.8 million within the urban area. Moscow has the status of a Russian federal city. - Ivan Mikhaylovich Gubkin ( Russian : ) ( September 21 ( O.S. September 9 ) 1871 -- April 21 , 1939 ) was a Russian geologist and president of the 1937 International Geological Congress in Moscow . He was a petroleum geologist particularly interested the region between the Volga and the Urals . Gubkin 's family came from the Belgorod area near Ukraine . He was well known to American geologists , as Goubkin , and attended the Annual Fieldtrip of the American Association of State Geologists in 1917 . In 1921 , he joined the Communist Party . He was elected to the Russian Academy of Sciences in 1929 , and served as its vice-president from 1936 to 1939 . Gubkin 's book '' The Study of Oil '' ( 1932 ) developed theory on the origins of oil and the conditions necessary for the formation of oil deposits , and laid out the principles of oil geology . He led the studies of the Kursk Magnetic Anomaly from 1920 to 1925 , which eventual led to the discovery of huge iron deposits . Gubkin was the editor of the journal Problems of Soviet Geology . In 1929 he received the Order of Lenin . During the first and second Five Year Plans , he was chairman of the '' Production Committee '' of the Academy of Sciences ( 1930 -- 1936 ) . Gubkin died in Moscow in 1939 . - Oskol (or Oskil) is a river in Russia and Ukraine. It is a left tributary of the Seversky Donets. It is 436km long, with a drainage basin of 14,680km. - Belgorod is a city and the administrative center of Belgorod Oblast, Russia, located on the Seversky Donets River just north of the border with Ukraine. Population: - Russia (from the Rus'), also officially known as the Russian Federation, is a country in Eurasia. At , Russia is the largest country in the world by surface area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 140million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern, about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world, other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod and Samara. - Petroleum geology is the study of origin, occurrence, movement, accumulation, and exploration of hydrocarbon fuels. It refers to the specific set of geological disciplines that are applied to the search for hydrocarbons (oil exploration). - Nizhny Novgorod, colloquially shortened to Nizhny, is a city in the administrative center of Nizhny Novgorod Oblast and Volga Federal District in Russia. From 1932 to 1990, it was known as Gorky, after the writer Maxim Gorky, who was born there. The city is an important economic, transportation, scientific, educational and cultural center in Russia and the vast Volga-Vyatka economic region, and is the main center of river tourism in Russia. In the historical part of the city there are a large number of universities, theaters, museums and churches. Nizhny Novgorod is located about 400km east of Moscow, where the Oka empties into the Volga. Population: - Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice, and/or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension in river water and on reaching the sea be deposited by sedimentation and if buried this may eventually become sandstone and siltstone, (sedimentary rocks). - In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers. The "stratum" is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy. - Gubkin is a town in Belgorod Oblast, Russia, located northeast of Belgorod on the Oskolets River, a tributary of the Oskol River. Population: Given the information above, choose from the list below the object entity that exhibits the relation 'place of birth' with the subject 'ivan gubkin'. Choices: - belgorod - belgorod oblast - center - march - moscow - nizhny novgorod - nizhny novgorod oblast - of - petersburg - russia - samara - ukraine
A:
nizhny novgorod oblast