Information:  - 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 400 km east of Moscow, where the Oka empties into the Volga. Population:   - Russia is not proportionately populated between the smaller western portion (almost 25%) of the country that is considered part of Europe, and the larger eastern portion (more than 75%) that is part of Asia. European Russia contains about 77% of the country's population (110,000,000 people out of about 144,000,000) in an area comprising almost 4 million km (1.54 million mi); an average of 27.5 persons per km (70 per mi). This territory makes up 38% of Europe. Its eastern border is defined by the Ural Mountains and in the south, it is defined by the border with Kazakhstan. This area includes Moscow and Saint Petersburg, the two largest cities in Russia.  - Eurasia is the combined continental landmass of Europe and Asia. The term is a portmanteau of its constituent continents. Located primarily in the Northern and Eastern Hemispheres, it is bordered by the Atlantic Ocean to the west, the Pacific Ocean to the east, the Arctic Ocean to the north, and by Africa, the Mediterranean Sea, and the Indian Ocean to the south. The division between Europe and Asia as two different continents is a historical and cultural construct, with no clear physical separation between them; thus, in some parts of the world, Eurasia is recognized as the largest of five or six continents. In geology, Eurasia is often considered as a single rigid megablock. However, the rigidity of Eurasia is debated based on the paleomagnet data.  - The Soviet Union, officially the Union of Soviet Socialist Republics (USSR " ) was a socialist state in Eurasia that existed from 1922 to 1991. A union of multiple subnational republics, its government and economy were highly centralized. The Soviet Union was a one-party federation, governed by the Communist Party with Moscow as its capital.  - A country is a region that is identified as a distinct national entity in political geography. A country may be an independent sovereign state or one that is occupied by another state, as a non-sovereign or formerly sovereign political division, or a geographic region associated with sets of previously independent or differently associated people with distinct political characteristics. Regardless of the physical geography, in the modern internationally accepted legal definition as defined by the League of Nations in 1937 and reaffirmed by the United Nations in 1945, a resident of a country is subject to the independent exercise of legal jurisdiction.  - 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.  - BRDM is an initialism for "Boyevaya Razvedyvatelnaya Dozornaya Mashina", (RU    ), literally "Combat Reconnaissance Patrol Vehicle". The BRDM is a four-wheeled amphibious vehicle which is very lightly armoured by today's standards. Both versions were produced in the Soviet Union and other Eastern Bloc countries. Both versions came in an ATGM variant. The BRDM-2 also came as a command vehicle and as an air defence vehicle.  - The BTR-40 (, from , or "Bronetransporter", literally "armoured transporter".) is a Soviet non-amphibious, wheeled armoured personnel carrier and reconnaissance vehicle. It is often referred to as the "Sorokovka" in Soviet service. It is also the first mass-produced Soviet APC. It was eventually replaced in the APC role by the BTR-152 and in the scout car role by the BRDM-1.  - Yekaterinburg, alternatively romanised as "Ekaterinburg", is the fourth-largest city in Russia and the administrative centre of Sverdlovsk Oblast, located in the middle of the Eurasian continent, on the border of Europe and Asia. At the 2010 Census, it had a population of 1,349,772.  - The BRDM-2 ("Boyevaya Razvedyvatelnaya Dozornaya Mashina",    , literally "Combat Reconnaissance/Patrol Vehicle") is an amphibious armoured patrol car used by Russia and the former Soviet Union. It was also known under the designations BTR-40PB, BTR-40P-2 and GAZ 41-08. This vehicle, like many other Soviet designs, has been exported extensively and is in use in at least 38 countries. It was intended to replace the earlier BRDM-1, compared to which it had improved amphibious capabilities and better armament.  - The BRDM - 1 ( Bronirovannaya Razvedyvatelnaya Dozornaya Mashina ,     , literally `` Armored reconnaissance / patrol vehicle '' ) was an amphibious armored scout car used by Russia and the former Soviet Union . It was originally known simply as BRDM but when the BRDM - 2 entered production and service with Soviet Army in 1962 , it received the designation BRDM - 1 . The BRDM ( also known as the BTR - 40P ) first appeared in 1957 , and was in production until 1966 . Total production was around 10,000 vehicles , less than 600 remain in the reserves of a number of countries .  - The Eastern Bloc was the group of communist states of Central and Eastern Europe, generally the Soviet Union and the countries of the Warsaw Pact. The terms Communist Bloc and Soviet Bloc were also used to denote groupings of states aligned with the Soviet Union, although these terms might include states outside Central and Eastern Europe.  - Novosibirsk is the third-most populous city in Russia after Moscow and St. Petersburg. It is the most populous city in Asian Russia, with a population of 1,473,754 as of the 2010 Census. It is the administrative center of Novosibirsk Oblast as well as of the Siberian Federal District. The city is located in the southwestern part of Siberia on the banks of the Ob River adjacent to the Ob River Valley, near the large water reservoir formed by the dam of the Novosibirsk Hydro Power Plant, and occupies an area of .  - Europe is a continent that comprises the westernmost part of Eurasia. Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean Sea to the south. To the east and southeast, Europe is generally considered as separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways of the Turkish Straits. Yet the non-oceanic borders of Europea concept dating back to classical antiquityare arbitrary. The primarily physiographic term "continent" as applied to Europe also incorporates cultural and political elements whose discontinuities are not always reflected by the continent's current overland boundaries.  - Saint Petersburg is Russia's second-largest city after Moscow, with five million inhabitants in 2012, and an important Russian port on the Baltic Sea. It is politically incorporated as a federal subject (a federal city). Situated on the Neva River, at the head of the Gulf of Finland on the Baltic Sea, it was founded by Tsar Peter the Great on May . In 1914, the name was changed from Saint Petersburg to Petrograd, in 1924 to Leningrad, and in 1991 back to Saint Petersburg. Between 17131728 and 17321918, Saint Petersburg was the imperial capital of Russia. In 1918, the central government bodies moved to Moscow.  - 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 140 million 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.    After reading the paragraphs above, we are interested in knowing the entity with which 'brdm-1' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - 1  - 1937  - 25  - amphibious vehicle  - capital  - city  - combat  - command  - continent  - country  - cultural center  - definition  - designation  - district  - federal city  - federal district  - federation  - geographic region  - geography  - geology  - government  - group  - head  - initialism  - jurisdiction  - landmass  - march  - may  - mediterranean sea  - name  - number  - oblast  - ocean  - pact  - population  - port  - production  - reconnaissance  - reservoir  - river  - saint  - service  - single  - six  - sovereign state  - soviet  - state  - status  - term  - territory  - two  - union  - water reservoir
Answer:
amphibious vehicle