Given the question: Information: - A continent is one of several very large landmasses on Earth. Generally identified by convention rather than any strict criteria, up to seven regions are commonly regarded as continents. Ordered from largest in size to smallest, they are: Asia, Africa, North America, South America, Antarctica, Europe, and Australia. In geology, areas of continental crust include regions covered with water. - Siberia is an extensive geographical region, and by the broadest definition is also known as North Asia. Siberia has historically been a part of Russia since the 17th century. - The Bering Strait ("Beringov proliv", Yupik: "Imakpik") is a strait of the Pacific, which borders with the Arctic to north. It is located between Russia and the United States. Named after Vitus Bering, a Danish-born explorer in the service of the Russian Empire, it lies slightly south of the Arctic Circle being at about 65 40' N latitude. The present Russia-US east-west boundary is at 168 58' 37" W. - The Caribbean Sea is a sea of the Atlantic Ocean in the tropics of the Western Hemisphere. It is bounded by Mexico and Central America to the west and south west, to the north by the Greater Antilles starting with Cuba, to the east by the Lesser Antilles, and to the south by the north coast of South America. - A navigator is the person on board a ship or aircraft responsible for its navigation. The navigator's primary responsibility is to be aware of ship or aircraft position at all times. Responsibilities include planning the journey, advising the ship's captain or aircraft commander of estimated timing to destinations while en route, and ensuring hazards are avoided. The navigator is in charge of maintaining the aircraft or ship's nautical charts, nautical publications, and navigational equipment, and generally has responsibility for meteorological equipment and communications. - The Americas, also collectively called America, encompass the totality of the continents of North America and South America. Together they make up most of Earth's western hemisphere and comprise the "New World". - The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's North pole. Due to the Earth's axial tilt, winter in the Northern Hemisphere lasts from the December solstice (typically December21 UTC) to the March Equinox (typically March20 UTC), while summer lasts from the June solstice (typically June21 UTC) through to the September equinox (typically September23 UTC). The dates vary each year due to the difference between the calendar year and the astronomical year. - A nautical chart is a graphic representation of a maritime area and adjacent coastal regions. Depending on the scale of the chart, it may show depths of water and heights of land (topographic map), natural features of the seabed, details of the coastline, navigational hazards, locations of natural and human-made aids to navigation, information on tides and currents, local details of the Earth's magnetic field, and human-made structures such as harbours, buildings and bridges. Nautical charts are essential tools for marine navigation; many countries require vessels, especially commercial ships, to carry them. Nautical charting may take the form of charts printed on paper or computerized electronic navigational charts. Recent technologies have made available paper charts which are printed "on demand" with cartographic data that has been downloaded to the commercial printing company as recently as the night before printing. With each daily download, critical data such as Local Notice to Mariners is added to the on-demand chart files so that these charts will be up to date at the time of printing. - Aleksei Ilyich Chirikov ( Russian : ) ( 1703 -- November 1748 ) was a Russian navigator and captain who along with Bering was the first Russian to reach North - West coast of North America . He discovered and charted some of the Aleutian Islands while he was deputy to Vitus Bering during the Great Northern Expedition . - The Arctic (or ) is a polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Alaska (United States), Canada, Finland, Greenland (Denmark), Iceland, Norway, Russia, and Sweden. Land within the Arctic region has seasonally varying snow and ice cover, with predominantly treeless permafrost-containing tundra. Arctic seas contain seasonal sea ice in many places. - The Caribbean (or ) is a region that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Sea and the North Atlantic Ocean) and the surrounding coasts. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, and north of South America. - North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be considered a northern subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea. - The Atlantic Ocean is the second largest of the world's oceans with a total area of about . It covers approximately 20 percent of the Earth's surface and about 29 percent of its water surface area. It separates the "Old World" from the "New World". - The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south and is bounded by Asia and Australia in the west and the Americas in the east. - South America is a continent located in the western hemisphere, mostly in the southern hemisphere, with a relatively small portion in the northern hemisphere. It is also considered a subcontinent of the Americas, which is the model used in nations that speak Romance languages. The reference to South America instead of other regions (like Latin America or the Southern Cone) has increased in the last decades due to changing geopolitical dynamics (in particular, the rise of Brazil). - The Great Northern Expedition or Second Kamchatka expedition was one of the largest organised exploration enterprises in history, resulting in mapping of the most of the Arctic coast of Siberia and some parts of the North America coastline, greatly reducing the "white areas" on the maps. The endeavour was initially conceived by Russian Emperor Peter I the Great and implemented in practice by Russian Empresses Anna and Elizabeth. The main organiser and leader of the expedition was Vitus Bering, who earlier had been commissioned by Peter I to lead the first Kamchatka expedition. The Second Kamchatka expedition lasted roughly from 17331743 and later became called the Great Northern due to the immense scale of its achievements. - The Western Hemisphere is a geographical term for the half of the earth that lies west of the Prime meridian (which crosses Greenwich, UK) and east of the antimeridian, the other half being called the Eastern Hemisphere. - The Russian Navy (lit. "Military-Maritime Fleet of the Russian Federation") is the naval arm of the Russian Armed Forces. The present Russian Navy was formed in January 1992, succeeding the Navy of the Commonwealth of Independent States, which had itself succeeded the Soviet Navy following the dissolution of the Soviet Union in December 1991. - Vitus Jonassen Bering (baptised 5 August 1681, died 19 December 1741), also known as Ivan Ivanovich Bering, was a Danish cartographer and explorer in Russian service, and an officer in the Russian Navy. He is known as a leader of two Russian expeditions, namely the First Kamchatka Expedition and the Great Northern Expedition, exploring of the north-eastern coast of the Asian continent and from there the western coast on the North American continent. The Bering Strait, the Bering Sea, Bering Island, the Bering Glacier and the Bering Land Bridge were all named in his honor. After reading the paragraphs above, we are interested in knowing the entity with which 'aleksei chirikov' exhibits the relationship of 'country of citizenship'. Find the answer from the choices below. Choices: - american - australia - brazil - canada - cuba - denmark - earth - finland - mexico - russia - russian empire - soviet union
The answer is:
russian empire