In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Ex Input:
Context: Protist is an informal term for any eukaryotic organism that is not an animal, plant or fungus. The protists do not form a natural group, or clade, but are often grouped together for convenience, like algae or invertebrates. In some systems of biological classification, such as the popular 5-kingdom scheme proposed by Robert Whittaker in 1969, the protists make up a kingdom called Protista, composed of "organisms which are unicellular or unicellular-colonial and which form no tissues.", The metamonads are a large group of flagellate amitochondriate protozoa . Their composition is not entirely settled , but they include the retortamonads , diplomonads , and possibly the parabasalids and oxymonads as well . These four groups are all anaerobic , occurring mostly as symbiotes of animals ., A flagellate is a cell or organism with one or more whip-like organelles called flagella. The word "flagellate" also describes a particular construction (or level of organization) characteristic of many protists (eukaryotic organisms) and their means of motion. The term presently does not imply any specific relationship or classification of the organisms that possess flagellae. However, the term "flagellate" is included in other terms (such as "dinoflagellate" and "choanoflagellata") which are more formally characterized., The retortamonads are a small group of flagellates, most commonly found in the intestines of animals as commensals, although a free-living species called the "Chilomastix cuspidata" exists. They are grouped under the taxon, Archezoa. They are usually around 5-20 m in length, and all of their small subunit ribosomal RNA gene sequences are very similar to each other. There are two genera: "Retortamonas" with two flagella, and "Chilomastix" with four. In both cases there are four basal bodies anterior to a prominent feeding groove, and one flagellum is directed back through the cell, emerging from the groove., The dinoflagellates (Greek  "dinos" "whirling" and Latin "flagellum" "whip, scourge") are a large group of flagellate protists that constitute the phylum Dinoflagellata. Most are marine plankton, but they are common in freshwater habitats, as well. Their populations are distributed depending on temperature, salinity, or depth. Many dinoflagellates are known to be photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey (phagotrophy). In terms of number of species, dinoflagellates form one of the largest groups of marine eukaryotes, although this group is substantially smaller than the diatoms. Some species are endosymbionts of marine animals and play an important part in the biology of coral reefs. Other dinoflagellates are unpigmented predators on other protozoa, and a few forms are parasitic (see for example "Oodinium", "Pfiesteria"). Some dinoflagellates produce resting stages, called dinoflagellate cysts or dinocysts, as part of their lifecycles., Subject: metamonad, Relation: instance_of, Options: (A) animal (B) biology (C) cell (D) clade (E) classification (F) construction (G) dinos (H) group (I) organism (J) organization (K) plant (L) taxon (M) term (N) whip

Ex Output:
taxon


Ex Input:
Context: A sovereign state is, in international law, a nonphysical juridical entity that is represented by one centralised government that has sovereignty over a geographic area. International law defines sovereign states as having a permanent population, defined territory, one government, and the capacity to enter into relations with other sovereign states. It is also normally understood that a sovereign state is neither dependent on nor subjected to any other power or state., The Korean Peninsula is a peninsula in East Asia. It extends southwards for about from continental Asia into the Pacific Ocean and is surrounded by the Sea of Japan (East Sea) to the east, and the Yellow Sea (West Sea) to the west, the Korea Strait connecting the first two bodies of water., The Korea Strait is a sea passage between Japan and South Korea, connecting the East China Sea and the Sea of Japan in the northwest Pacific Ocean. The strait is split by the Tsushima Island into the western channel and the Tsushima Strait (eastern channel)., East Asia is the eastern subregion of the Asian continent, which can be defined in either geographical or ethno-cultural terms. Geographically and geopolitically, it includes China, Hong Kong, and Macao; Mongolia and Taiwan; North and South Korea; and Japan; it covers about , or about 28% of the Asian continent, about twice the area of Europe., Koreans (alternatively , see names of Korea) are an ethnic group native to the whole Korean Peninsula and southeastern Manchuria. Koreans mainly live in the two Korean nation states, South Korea and North Korea (collectively referred to simply as Korea), but are also an officially recognized minority in China, Japan, Russia, Uzbekistan and a number of other former Soviet Union states. Over the course of the 20th century, significant Korean communities have emerged in Australia, United States, Canada and, to a lesser extent, other nations with primarily immigrant background. As of 2013, there were an estimated 7.4 million ethnic Korean expatriates around the world., An ethnic group or ethnicity is a category of people who identify with each other based on similarities, such as common ancestral, language, social, cultural or national experiences. Unlike other social groups (wealth, age, hobbies), ethnicity is often an inherited status based on the society in which one lives. In some cases, it can be adopted if a person moves into another society. Membership of an ethnic group tends to be defined by a shared cultural heritage, ancestry, origin myth, history, homeland, language or dialect, symbolic systems such as religion, mythology and ritual, cuisine, dressing style, art, and physical appearance., China, officially the People's Republic of China (PRC), is a unitary sovereign state in East Asia. With a population of over 1.381 billion, it is the world's most populous country. The state is governed by the Communist Party of China, and its capital is Beijing. It exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau), and claims sovereignty over Taiwan. The country's major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong. China is a great power and a major regional power within Asia, and has been characterized as a potential superpower., There are various names of Korea in use today, derived from ancient kingdoms and dynasties. The modern English name Korea is an exonym derived from the Goryeo period and is used by both North Korea and South Korea in international contexts. In the Korean language, the two Koreas use different terms to refer to the nominally unified nation: Chosn in North Korea, and Hanguk in South Korea., 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., Manchuria is a modern name, first created by Japanese, given to a large geographic region in Northeast Asia. Depending on the context, Manchuria can either refer to a region that falls entirely within the People's Republic of China, or a larger region divided between China and Russia. The region that falls entirely within modern China is now usually referred to as Northeast China in China, although "Manchuria" is widely used outside of China to denote the geographical and historical region. This region is the traditional homeland of the Xianbei, Khitan, and Jurchen (later called Manchu) peoples, who built several states historically, although no term for "Manchuria" exists in the Manchu language, which originally referred to the area as the "Three Eastern Provinces"., Hermit kingdom is a term applied to any country , organization or society which willfully walls itself off , either metaphorically or physically , from the rest of the world . The Joseon dynasty of Korea was frequently described as a hermit kingdom during the latter part of the dynasty . The term is still commonplace throughout Korea and is often used by Koreans themselves to describe pre-modern Korea . Today , the term is often applied to North Korea in news media , and in 2009 was used by United States Secretary of State Hillary Clinton . Other countries , like Bhutan and the Mutawakkilite Kingdom of Yemen , have also been described as hermit kingdoms due to their government 's reluctance to engage in dialogue with the outside world . The early African civilization of Axum , now known as Ethiopia , was identified by the Europeans as the `` hermit kingdom '' . The first documented use of `` hermit kingdom '' to refer to Korea is in the title of William Elliot Griffis ' 1882 book Corea : The Hermit Nation , well before the division of Korea ., 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., South Korea, officially the Republic of Korea (ROK), is a sovereign state in East Asia, constituting the southern part of the Korean Peninsula., North Korea, officially the Democratic People's Republic of Korea (DPRK ), is a country in East Asia, in the northern part of the Korean Peninsula. Pyongyang is both the nation's capital as well as its largest city. To the north and northwest the country is bordered by China and by Russia along the Amnok (known as the Yalu in China) and Tumen rivers. The country is bordered to the south by South Korea, with the heavily fortified Korean Demilitarized Zone (DMZ) separating the two., A nation state is a type of state that joins the political entity of a state to the cultural entity of a nation, from which it aims to derive its political legitimacy to rule and potentially its status as a sovereign state.
A state is specifically a political and geopolitical entity, whilst a nation is a cultural and ethnic one. The term "nation state" implies that the two coincide, in that a state has chosen to adopt and endorse a specific cultural group as associated with it., Korea is a historical state in East Asia, since 1945 divided into two distinct sovereign states: North Korea (officially the "Democratic People's Republic of Korea") and South Korea (officially the "Republic of Korea"). Located on the Korean Peninsula, Korea is bordered by China to the northwest and Russia to the northeast. It is separated from Japan to the east by the Korea Strait and the East Sea., Japan ("Nippon" or "Nihon" ; formally "" or "Nihon-koku", means "State of Japan") is a sovereign island nation in Eastern Asia. Located in the Pacific Ocean, It is lying off the eastern coast of the Asia Mainland (east of China, Korea, Russia) and stretching from the Sea of Okhotsk in the north to the East China Sea and near Taiwan in the southwest. , Subject: hermit kingdom, Relation: subclass_of, Options: (A) age (B) area (C) background (D) capital (E) category (F) channel (G) city (H) coast (I) country (J) course (K) cultural heritage (L) english (M) ethnic group (N) federation (O) geographic region (P) government (Q) island (R) japanese (S) korean (T) language (U) mythology (V) name (W) nation (X) party (Y) people (Z) person ([) population (\) republic (]) russian (^) saint (_) society (`) sovereign state (a) state (b) status (c) strait (d) stretching (e) subregion (f) term (g) territory (h) water (i) western (j) yellow

Ex Output:
sovereign state


Ex Input:
Context: Prestressed concrete is a concrete construction material which is placed under compression prior to it supporting any applied loads (i.e. it is "pre" stressed). A more technical definition is ""Structural concrete in which internal stresses have been introduced to reduce potential tensile stresses in the concrete resulting from loads."" This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete volume, and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars, and are most commonly made from high-tensile steels, carbon fibre or aramid fibre. The essence of prestressed concrete is that once the initial compression has been applied, the resulting material has the characteristics of high-strength concrete when subject to any subsequent compression forces, and of ductile high-strength steel when subject to tension forces. This can result in improved structural capacity and/or serviceability compared to conventionally reinforced concrete in many situations.
Prestressed concrete is used in a wide range of building and civil structures where its improved concrete performance can allow longer spans, reduced structural thicknesses, and material savings to be realised compared to reinforced concrete. Typical applications range through high-rise buildings, residential slabs, foundation systems, bridge and dam structures, silos and tanks, industrial pavements and nuclear containment structures., A bridge is a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that each serve a particular purpose and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it., A cantilever bridge is a bridge built using cantilevers, structures that project horizontally into space, supported on only one end. For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete. The steel truss cantilever bridge was a major engineering breakthrough when first put into practice, as it can span distances of over , and can be more easily constructed at difficult crossings by virtue of using little or no falsework., This list of cantilever bridges ranks the world 's Cantilever bridges by the length of their main span . A cantilever bridge is a bridge built using cantilevers : structures that project horizontally into space , supported on only one end ., In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object". A "two-force member" is a structural component where force is applied to only two points. Although this rigorous definition allows the members to have any shape connected in any stable configuration, trusses typically comprise five or more triangular units constructed with straight members whose ends are connected at joints referred to as nodes. In this typical context, external forces and reactions to those forces are considered to act only at the nodes and result in forces in the members that are either tensile or compressive. For straight members, moments (torques) are explicitly excluded because, and only because, all the joints in a truss are treated as revolutes, as is necessary for the links to be two-force members., Subject: list of longest cantilever bridge spans, Relation: is_a_list_of, Options: (A) bridge (B) building (C) dam (D) object (E) single

Ex Output:

building