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).

Context: A U.S. state is a constituent political entity of the United States of America. There are 50 states, which are bound together in a union with each other. Each state holds administrative jurisdiction over a defined geographic territory, and shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody)., The Page Valley is a small valley geographically and culturally associated with the Shenandoah Valley. The valley is located between the Massanutten and Blue Ridge mountain ranges in western Virginia., The Potomac River is located along the mid-Atlantic Ocean coast of the United States and flows into the Chesapeake Bay. The river (main stem and North Branch) is approximately long, with a drainage area of about 14,700 square miles (38,000 km²). In terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the United States and the 21st largest in the United States. Over 5 million people live within the Potomac watershed., West Virginia is a state located in the Appalachian region of the Southern United States. It is bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the north (and, slightly, east), and Maryland to the northeast. West Virginia is the 41st largest by area, the 38th most populous, and has the second lowest household income of the 50 United States. The capital and largest city is Charleston., Virginia (, officially the Commonwealth of Virginia) is a state located in the Mid-Atlantic region of the United States, as well as in the historic Southeast. Virginia is nicknamed the "Old Dominion" due to its status as the first colonial possession established in mainland British America, and "Mother of Presidents" because eight U.S. presidents were born there, more than any other state. The geography and climate of the Commonwealth are shaped by the Blue Ridge Mountains and the Chesapeake Bay, which provide habitat for much of its flora and fauna. The capital of the Commonwealth is Richmond; Virginia Beach is the most populous city, and Fairfax County is the most populous political subdivision. The Commonwealth's estimated population is over 8.3 million, which is slightly less than New York City., The Shenandoah River is a tributary of the Potomac River, long with two forks approximately long each, in the U.S. states of Virginia and West Virginia. The principal tributary of the Potomac, the river and its tributaries drain the central and lower Shenandoah Valley and the Page Valley in the Appalachians on the west side of the Blue Ridge Mountains, in northwestern Virginia and the Eastern Panhandle of West Virginia., A tributary or affluent is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean., Hopewell , also known as Hopewell Mills and Hopewell Farm , was established around 1765 by William Little , Sr. , who built grain and saw mills near the Shenandoah River . In 1827 , William Little , Jr. sold the property to James Hite and Jacob Newcomer . Hite named the property `` Hopewell '' , identifying the mill with a place in Leetown also named Hopewell , where there was a Quaker meeting house . Hite 's descendant , Thomas Hite Willis , operated and expanded the mill , adding a woolen mill. The woolen mill operated until the 1920s providing uniforms for the Army . The complex includes a log - and - clapboard house , built circa 1765 with twentieth century additions , a tenant house ( known as the `` Viand Cottage '' ) from the same era and of similar construction , several outbuildings and the ruins of the woolen mill , circa 1850 ., The Shenandoah Valley is a geographic valley and cultural region of western Virginia and the Eastern Panhandle of West Virginia in the United States. The valley is bounded to the east by the Blue Ridge Mountains, to the west by the eastern front of the Ridge-and-Valley Appalachians (excluding Massanutten Mountain), to the north by the Potomac River and to the south by the James River. The cultural region covers a larger area that includes all of the valley plus the Virginia highlands to the west, and the Roanoke Valley to the south. It is physiographically located within the Ridge and Valley province and is a portion of the Great Appalachian Valley., The Blue Ridge Mountains are a physiographic province of the larger Appalachian Mountains range. This province consists of northern and southern physiographic regions, which divide near the Roanoke River gap. The mountain range is located in the eastern United States, starting at its southernmost portion in Georgia, then ending northward in Pennsylvania. To the west of the Blue Ridge, between it and the bulk of the Appalachians, lies the Great Appalachian Valley, bordered on the west by the Ridge and Valley province of the Appalachian range., Subject: hopewell , Relation: located_in_the_administrative_territorial_entity, Options: (A) atlantic ocean (B) basin (C) central (D) charleston (E) fairfax county (F) gap (G) georgia (H) kentucky (I) mainland (J) maryland (K) most (L) northern (M) of (N) river (O) shenandoah (P) south (Q) the valley (R) union (S) virginia (T) virginia beach (U) west virginia (V) york
west virginia

Context: David Warren Ellefson (born November 12, 1964) is an American bassist and 2nd longest serving member of the American thrash metal band Megadeth from 1983 to 2002 and again from 2010. He has also been referred to as "Junior" to differentiate him from his bandmate Dave Mustaine, but does not go by this name professionally. Ellefson currently resides in Scottsdale, Arizona. In addition to playing bass guitar in Megadeth, Ellefson also has various side projects which include Temple of Brutality, F5, and Killing Machine., W.A.S.P. is an American heavy metal band formed in 1982 by Blackie Lawless, who is the only remaining original member of the band. They emerged from the same Los Angeles scene that spawned Van Halen, Mötley Crüe, Dokken, Ratt, Quiet Riot, Guns N' Roses, Great White, L.A. Guns, Leatherwolf and others. The band's popularity peaked in the 1980s, yet they continue to record and tour, making them one of the most enduring of the West Coast heavy metal bands. W.A.S.P. gained notoriety for their shock rock themed image, lyrics and live performances. They have sold over 12 million copies of their albums., L.A. Guns are an American hard rock band from Los Angeles, California, formed in 1983. As of 2014, the lineup consists of Phil Lewis (lead vocals, rhythm guitar), Steve Riley (drums, percussion, backing vocals), Kenny Kweens (bass guitar, backing vocals), and Michael Grant (lead guitar, backing vocals). The first incarnation of the group was formed by Tracii Guns in 1983 and merged with fellow Los Angeles group Hollywood Rose to form Guns N' Roses in 1984. In 1985, the group was reformed by Guns and singer Paul Black adding Mick Cripps and Nickey Alexander. Black would soon be replaced by former Girl singer Phil Lewis while former Faster Pussycat bassist Kelly Nickels was added to the group. Later, Alexander would be replaced by former W.A.S.P. drummer Steve Riley with this being known as the "classic lineup" of L.A. Guns. They achieved moderate chart success in the late 1980s and early 1990s. However, the group went through numerous lineup changes (with Riley being the most consistent member) and failed to regain mainstream attention., David Scott "Dave" Mustaine (born September 13, 1961) is an American musician, singer, songwriter, actor and author. He is best known as the co-founder, guitarist, and lead singer of the American thrash metal band Megadeth, and the original lead guitarist of the American thrash metal band Metallica., Mötley Crüe was an American glam metal band formed in Los Angeles, California on January 17, 1981. The group was founded by bass guitarist Nikki Sixx and drummer Tommy Lee, lead singer Vince Neil and lead guitarist Mick Mars. Mötley Crüe has sold more than 100 million records worldwide including 25 million in the US, making them one of the world's best-selling bands of all time., 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., Los Angeles (Spanish for "The Angels"), officially the City of Los Angeles and often known by its initials L.A., is the second-most populous city in the United States (after New York City), the most populous city in California and the county seat of Los Angeles County. Situated in Southern California, Los Angeles is known for its mediterranean climate, ethnic diversity, sprawling metropolis, and as a major center of the American entertainment industry. Los Angeles lies in a large coastal basin surrounded on three sides by mountains reaching up to and over ., Great White is an American hard rock band, formed in Los Angeles in 1977. The band gained popularity during the 1980s and early 1990s. The band released several albums in the late 1980s and gained airplay on MTV with music videos for songs like "Once Bitten, Twice Shy". The band reached their peak popularity with the album "...Twice Shy" in 1989., Judas Priest are a British heavy metal band formed in Birmingham, England, in 1969. The band has sold close to 50 million albums to date. MTV ranked them the second greatest metal band of all time. Despite an innovative and pioneering body of work in the latter half of the 1970s, the band struggled with indifferently produced records, repeated changes of drummer and a lack of major commercial success or attention until 1980, when they adopted a more simplified sound on the album "British Steel", which helped shoot them to rock superstar status. In 1989, they were named as defendants in an unsuccessful lawsuit alleging that subliminal messages on the song "Better By You, Better Than Me" had caused the suicide attempts of two young men., Van Halen is an American hard rock band formed in Pasadena, California, in 1972. From 1974 until 1985, the band consisted of guitarist Eddie Van Halen, vocalist David Lee Roth, drummer Alex Van Halen, and bassist Michael Anthony., Blackie Lawless (born Steven Edward Duren; September 4, 1956) is an American songwriter and musician best known as the lead singer and rhythm guitarist (formerly bassist) for the heavy metal band W.A.S.P., Guns N' Roses is an American hard rock band from Los Angeles formed in 1985. The lineup, when first signed to Geffen Records in 1986, consisted of vocalist Axl Rose, lead guitarist Slash, rhythm guitarist Izzy Stradlin, bassist Duff McKagan, and drummer Steven Adler. The current lineup consists of Rose, Slash, McKagan, keyboardists Dizzy Reed and Melissa Reese, guitarist Richard Fortus and drummer Frank Ferrer. The band has released six studio albums, accumulating sales of more than 100 million records worldwide, including shipments of 45 million in the United States, making Guns N' Roses one of the world's best-selling bands of all time., Warlock were a German heavy metal band , assembled in 1982 with members of the underground bands Snakebite and Beast . The band gained popularity and some commercial success in Europe in the mid- 1980s , due also to the personality and stage presence of lead vocalist Doro Pesch . Warlock supported on tour successful metal bands , such as W.A.S.P. , Judas Priest , Dio and Megadeth . By the end of the decade , Doro Pesch was the sole original member who remained in the band and she was forced to change the name to Doro for legal reasons . Doro , the band , continues to play several songs taken from the Warlock repertoire in their live shows . The band has reunited for festival appearances and special occasions since 2003 , under the name Warlock 1986 ., Shock rock is an umbrella term for artists who combine rock music or metal with highly theatrical live performances emphasizing shock value. Performances may include violent or provocative behavior from the artists, the use of attention-grabbing imagery such as costumes, masks, or face paint, or special effects such as pyrotechnics or fake blood. Shock rock also often includes elements of horror., Megadeth is an American heavy thrash metal band from Los Angeles, California. Guitarist Dave Mustaine and bassist David Ellefson formed the band in 1983 shortly after Mustaine's dismissal from Metallica. A pioneer of the American thrash metal scene, the band is credited as one of the genre's "big four" with Anthrax, Metallica and Slayer, responsible for thrash metal's development and popularization. Megadeth plays in a technical style, featuring fast rhythm sections and complex arrangements. Themes of death, war, politics and religion are prominent in the group's lyrics., Quiet Riot is an American heavy metal band, best known for their hit singles "Metal Health" and "Cum on Feel the Noize." The band was founded in 1973, by guitarist Randy Rhoads and bassist Kelly Garni under the name Mach 1. They then changed the name to Little Women, before settling on Quiet Riot in May 1975. The band's name was inspired by a conversation with Rick Parfitt of the British band Status Quo, in which Parfitt said he'd like to name a band "Quite Right," and his thick English accent made it sound like he was saying "Quiet Riot." The band is ranked at No. 100 on VH1's 100 Greatest Artists of Hard Rock., MTV (originally an initialism of Music Television) is an American cable and satellite television channel owned by Viacom Media Networks (a division of Viacom) and headquartered in New York City. Launched on August 1, 1981, the channel originally aired music videos as guided by television personalities known as "video jockeys" (VJs). In its early years, MTV's main target demographic was young adults, but today it is primarily towards teenagers, high school students and college students. MTV has toned down its music video programming significantly in recent years, and its programming now consists mainly of original reality, comedy and drama programming and some off-network syndicated programs and films, with limited music video programming in off-peak time periods. It has received criticism towards this change of focus, both by certain segments of its audience and musicians. MTV's influence on its audience, including issues involving censorship and social activism, has also been a subject of debate for several years., Metallica is an American heavy metal band formed in Los Angeles, California. The band was formed in 1981 when vocalist/guitarist James Hetfield responded to an advertisement posted by drummer Lars Ulrich in a local newspaper. Metallica's current line-up comprises founding members Hetfield and Ulrich, longtime lead guitarist Kirk Hammett and bassist Robert Trujillo. Guitarist Dave Mustaine and bassists Ron McGovney, Cliff Burton and Jason Newsted are former members of the band., Ratt (stylized as RATT) is an American heavy metal band that had significant commercial success in the 1980s, with their albums having been certified as gold, platinum, and multi-platinum by the RIAA. The group is perhaps best known for hit singles such as "Round and Round" and "Lay It Down", tracks that ranked on Billboard's top 40 at No. 12 and No. 40, respectively, as well as other songs such as "Wanted Man", "You're in Love" and "Dance". Along with groups such as friendly rivals Mötley Crüe, Ratt has been recognized as instrumental in the formation of the early 1980s Los Angeles glam metal scene, also known as "hair metal" or "pop metal"., Thrash metal is an extreme subgenre of heavy metal music characterized by its fast tempo and overall aggression. The songs usually use fast percussive beats and low-register guitar riffs, overlaid with shredding-style lead work. The lyrics often deal with social issues and reproach for The Establishment, using direct and denunciatory language, an approach borrowed from hardcore punk., Leatherwolf is an American heavy metal band that formed in Huntington Beach, California in 1981. They split up in 1991, but reunited in 1999. The group is also nicknamed the "Triple Axe Attack" for pioneering the use of a 3-guitar line-up in heavy metal. Currently comprising vocalist and guitarist Michael Olivieri, guitarists Rob Math and Joey Tafolla, bassist Patrick Guyton, and drummer Dean Roberts, the band has released five studio albums. Leatherwolf has gone through many line-up changes, leaving Roberts as the only constant member. Though the band continues to perform live, they have not released any studio material since their 2007 album "New World Asylum"., Birmingham is a major city and metropolitan borough of West Midlands, England. It is the largest and most populous British city outside London, with a population in 2014 of 1,101,360. The city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census. Birmingham's metropolitan area is the second most populous in the UK with a population of 3.8 million. This also makes Birmingham the 9th most populous metropolitan area in Europe., "Better by You, Better than Me" is a 1969 song by the English rock band Spooky Tooth. The song was covered in 1978 by heavy metal band Judas Priest., Slayer is an American thrash metal band from Huntington Park, California, formed in 1981 by guitarist Kerry King and drummer Dave Lombardo. Slayer rose to fame with its 1986 release "Reign in Blood", and is credited as one of the "big four" thrash metal bands, along with Metallica, Megadeth, and Anthrax. Since its debut album in 1983, the band has released twelve studio albums, two live albums, a box set, six music videos, two extended plays and a cover album. Four of the band's studio albums have received gold certification in the United States. The band has received five Grammy nominations, winning one in 2007 for the song "Eyes of the Insane", and one in 2008 for the song "Final Six" (both from 2006's "Christ Illusion"). Slayer has also played at several music festivals worldwide, including Unholy Alliance, Download and Ozzfest., Subject: warlock , Relation: genre, Options: (A) album (B) country (C) entertainment (D) genre (E) glam metal (F) health (G) heavy metal (H) heavy metal music (I) horror (J) image (K) james (L) love (M) music (N) music video (O) percussion (P) politics (Q) pop (R) rhythm (S) rock (T) rock music (U) song (V) television (W) thrash metal (X) urban (Y) various (Z) war ([) western
heavy metal music

Context: Vertebrates comprise all species of animals within the subphylum Vertebrata (chordates with backbones). Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 64,000 species described. Vertebrates include the jawless fish and the jawed vertebrates, which include the cartilaginous fish (sharks and rays) and the bony fish. , Macroparasites are parasites that are large enough to be seen with the naked eye, in contrast to microparasites. They grow in one host but reproduce by infective stages outside this host. These generally include ticks, mites, helminths (nematodes, flatworms, etc.), and can be either external parasites (ectoparasitic) or internal parasites (endoparasitic). The most abundant macroparasite in humans is the nematode "Ascaris lumbricoides "which causes an infection called ascariasis. Macroparasites are also parasitic of many plant species and can be a significant agricultural pest., Heinrich Anton de Bary (26 January 183119 January 1888) was a German surgeon, botanist, microbiologist, and mycologist (fungal systematics and physiology).
He is considered a founding father of plant pathology (phytopathology) as well as the founder of modern mycology. His extensive and careful studies of the life history of fungi and contribution to the understanding of algae and higher plants were landmarks of biology.
He is considered a founding father of plant pathology (phytopathology) as well as the founder of modern mycology. His extensive and careful studies of the life history of fungi and contribution to the understanding of algae and higher plants were landmarks of biology., Arthropods (class Athropoda) are covered with a tough, resilient integument or exoskeleton of chitin. Generally the exoskeleton will have thickened areas in which the chitin is reinforced or stiffened by materials such as minerals or hardened proteins. This happens in parts of the body where there is a need for rigidity or elasticity. Typically the mineral crystals, mainly calcium carbonate, are deposited among the chitin and protein molecules in a process called biomineralization. The crystals and fibres interpenetrate and reinforce each other, the minerals supplying the hardness and resistance to compression, while the chitin supplies the tensile strength. Biomineralization occurs mainly in crustaceans; in insects and Arachnids the main reinforcing materials are various proteins hardened by linking the fibres in processes called sclerotisation and the hardened proteins are called sclerotin., Mammals are any vertebrates within the class Mammalia (from Latin "mamma" "breast"), a clade of endothermic amniotes distinguished from reptiles and birds by the possession of a neocortex (a region of the brain), hair, three middle ear bones and mammary glands. The sister group of mammals may be the extinct "Haldanodon." The mammals represent the only living Synapsida, which together with the Sauropsida form the Amniota clade. The mammals consist of the Yinotheria including monotrema and the Theriiformes including the theria., The wels catfish (or ; "Silurus glanis"), also called sheatfish, is a large species of catfish native to wide areas of central, southern, and eastern Europe, in the basins of the Baltic, Black, and Caspian Seas. It has been introduced to Western Europe as a sport fish and is now found from the United Kingdom all the way east to Kazakhstan and China and south to Greece and Turkey. It is a scaleless freshwater fish recognizable by its broad, flat head and wide mouth. Wels catfish can live for at least fifty years and have very good hearing to compensate for their poor sight., Hair is a protein filament that grows from follicles found in the dermis, or skin. Hair is one of the defining characteristics of mammals.
The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types and hair care, but hair is also an important biomaterial primarily composed of protein, notably keratin., In 21st-century systems of biological classification, the Protozoa are defined as a diverse group of unicellular eukaryotic organisms. Historically, protozoa were defined as single-celled animals or organisms with animal-like behaviors, such as motility and predation. The group was regarded as the zoological counterpart to the "protophyta", which were considered to be plant-like, as they are capable of photosynthesis., Lampreys (sometimes also called, inaccurately, lamprey eels) are any jawless fish of the order Petromyzontiformes, placed in the superclass Cyclostomata. The adult lamprey may be characterized by a toothed, funnel-like sucking mouth. The common name "lamprey" is probably derived from Latin "lampetra", which may mean "stone licker" ("lambere" "to lick" + "petra" "stone"), though the etymology is uncertain., A fin is a thin component or appendage attached to a larger body or structure. Fins typically function as foils that produce lift or thrust, or provide the ability to steer or stabilize motion while traveling in water, air, or other fluid media. Fins are also used to increase surface areas for heat transfer purposes, or simply as ornamentation., Symbiosis (from Greek  "living together", from  "together" and  "living") is a close and often long-term interaction between two different biological species. In 1877, Albert Bernhard Frank used the word "symbiosis" (which previously had been used to depict people living together in community) to describe the mutualistic relationship in lichens. In 1879, the German mycologist Heinrich Anton de Bary defined it as "the living together of unlike organisms.", Skin is the soft outer covering of vertebrates. Other animal coverings, such as the arthropod exoskeleton have different developmental origin, structure and chemical composition. The adjective cutaneous means "of the skin" (from Latin "cutis", skin). In mammals, the skin is an organ of the integumentary system made up of multiple layers of ectodermal tissue, and guards the underlying muscles, bones, ligaments and internal organs. Skin of a different nature exists in amphibians, reptiles, and birds. All mammals have some hair on their skin, even marine mammals like whales, dolphins, and porpoises which appear to be hairless.
The skin interfaces with the environment and is the first line of defense from external factors. For example, the skin plays a key role in protecting the body against pathogens and excessive water loss. Its other functions are insulation, temperature regulation, sensation, and the production of vitamin D folates. Severely damaged skin may heal by forming scar tissue. This is sometimes discoloured and depigmented. The thickness of skin also varies from location to location on an organism. In humans for example, the skin located under the eyes and around the eyelids is the thinnest skin in the body at 0.5 mm thick, and is one of the first areas to show signs of aging such as "crows feet" and wrinkles. The skin on the palms and the soles of the feet is 4 mm thick and the back is 14 mm thick and is the thickest skin in the body. The speed and quality of wound healing in skin is promoted by the reception of estrogen., Bodianus is a genus of fish in the family Labridae found in the Atlantic, Indian and Pacific Ocean. These species have many parasites., Pipefishes or pipe-fishes (Syngnathinae) are a subfamily of small fishes, which, together with the seahorses and seadragons, form the family Syngnathidae., Paracheilinus is a genus of flasher wrasses, native to the Indian Ocean and the western Pacific Ocean., Reptiles are tetrapod (four-limbed vertebrate) animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology., Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. Modern amphibians are all Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in recent decades there has been a dramatic decline in amphibian populations for many species around the globe., Callichthyidae is a family of catfishes (order Siluriformes), called armored catfishes due to the two rows of bony plates (or scutes) running down the length of their bodies. This family contains some of the most popular freshwater aquarium fish, such as the species of "Corydoras"., Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species, the Mekong giant catfish from Southeast Asia, the wels catfish of Eurasia and the Piraíba of South America, to detritivores (species that eat dead material on the bottom), and even to a tiny parasitic species commonly called the candiru, "Vandellia cirrhosa". There are armour-plated types and there are also naked types, neither having scales. Despite their name, not all catfish have prominent barbel. Members of the Siluriformes order are defined by features of the skull and swimbladder. Catfish are of considerable commercial importance; many of the larger species are farmed or fished for food. Many of the smaller species, particularly the genus "Corydoras", are important in the aquarium hobby. Many catfish are nocturnal, but others (many "Auchenipteridae") are "crepuscular" or "diurnal" (most "Loricariidae or" "Callichthyidae" for example)., A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata, which is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords. The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals. Some tunicates live as solitary individuals, but others replicate by budding and become colonies, each unit being known as a zooid. They are marine filter feeders with a water-filled, sac-like body structure and two tubular openings, known as siphons, through which they draw in and expel water. During their respiration and feeding, they take in water through the incurrent (or inhalant) siphon and expel the filtered water through the excurrent (or exhalant) siphon. Most adult tunicates are sessile, and are permanently attached to rocks or other hard surfaces on the ocean floor; others, such as salps, doliolids and pyrosomes, swim in the pelagic zone of the sea as adults. Various species are commonly known as sea squirts, sea pork, sea livers, or sea tulips., Bacteria (common noun bacteria, singular bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals., Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from wasp-like ancestors in the Cretaceous period, about 99 million years ago and diversified after the rise of flowering plants. More than 12,500 of an estimated total of 22,000 species have been classified. They are easily identified by their elbowed antennae and the distinctive node-like structure that forms their slender waists., The Syngnathidae is a family of fish which includes the seahorses, the pipefishes, the pipehorses, and the leafy, ruby, and weedy seadragons. The name is derived from Greek, "syn", meaning "fused" or "together", and "gnathus", meaning "jaws". This fused jaw trait is something the entire family has in common., Detritivores, also known as detrivores, detritophages, detritus feeders, or detritus eaters, are heterotrophs that obtain nutrients by consuming detritus (decomposing plant and animal parts as well as feces). There are many kinds of invertebrates, vertebrates and plants that carry out coprophagy. By doing so, all these detritivores contribute to decomposition and the nutrient cycles. They should be distinguished from other decomposers, such as many species of bacteria, fungi and protists, which are unable to ingest discrete lumps of matter, but instead live by absorbing and metabolizing on a molecular scale (saprotrophic nutrition). However, the terms detritivore and decomposer are often used interchangeably. , A pig is any of the animals in the genus Sus, within the Suidae family of even-toed ungulates. Pigs include the domestic pig and its ancestor, the common Eurasian wild boar ("Sus scrofa"), along with other species; related creatures outside the genus include the peccary, the babirusa, and the warthog. Pigs, like all suids, are native to the Eurasian and African continents. Juvenile pigs are known as piglets. Pigs are highly social and intelligent animals., A microparasite is a parasite of microscopic size. Opposed to macroparasites, which can be seen with the naked eye. Bacteria, viruses, protozoans are examples of microparasites., In biology/ecology, parasitism is a non-mutual relationship between species, where one species, the parasite, benefits at the expense of the other, the host. Traditionally "parasite" (in biological usage) referred primarily to organisms visible to the naked eye, or macroparasites (such as helminths). Parasites can be microparasites, which are typically smaller, such as protozoa, viruses, and bacteria. Examples of parasites include the plants mistletoe and cuscuta, and animals such as hookworms., Candiru (English and Portuguese or "candirú" in Spanish), "Vandellia cirrhosa", also known as cañero, toothpick fish, or vampire fish, is a species of parasitic freshwater catfish in the family "Trichomycteridae" native to the Amazon Basin where it is found in the countries of Bolivia, Brazil, Colombia, Ecuador and Peru., Crepuscular animals are those that are active primarily during twilight (i.e., the period immediately after dawn and that immediately before dusk). It is thus to be distinguished from diurnal and nocturnal behavior where an animal is active during the hours of daylight or the hours of darkness respectively. The term is not precise, however, as some crepuscular animals may also be active on a moonlit night or during an overcast day. The term matutinal is used for animals that are only active before dawn, and vespertine for those only active after sunset., The humphead wrasse ("Cheilinus undulatus") is a species of wrasse mainly found on coral reefs in the Indo-Pacific region. It is also known as the Mori wrasse, Napoleon wrasse, Napoleon fish, Napoleonfish, "so mei"  (Cantonese), "mameng" (Filipino), and "merer" in the Pohnpeian language of the Caroline Islands., Cuscuta (dodder) is a genus of about 100170 species of yellow, orange, or red (rarely green) parasitic plants. Formerly treated as the only genus in the family Cuscutaceae, it now is accepted as belonging in the morning glory family, Convolvulaceae, on the basis of the work of the Angiosperm Phylogeny Group. The genus is found throughout the temperate and tropical regions of the world, with the greatest species diversity in subtropical and tropical regions; the genus becomes rare in cool temperate climates, with only four species native to northern Europe., A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment., Cirrhilabrus is a genus of fish in the family Labridae native to reefs in the Indian and Pacific Ocean, commonly kept in aquaria., Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). The animal kingdom emerged as a basal clade within Apoikozoa as a sister of the choanoflagellates. Sponges are the most basal clade of animals. Animals are motile, meaning they can move spontaneously and independently at some point in their lives. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance., The superclass Tetrapoda (Ancient Greek s tetrapods, "four-footed"), or the tetrapods , comprises the first four-limbed vertebrates and their descendants, including the living and extinct amphibians, birds, mammals, reptiles and some ancient, exclusively aquatic creatures such as the Acanthostega. Tetrapods evolved from the lobe-finned fishes around 390 million years ago in the middle Devonian Period, with modern tetrapod groups having appeared by the late Devonian, 367.5 million years ago. The specific aquatic ancestors of the tetrapods, and the process by which land colonization occurred, remain unclear, and are areas of active research and debate among palaeontologists at present., The Mekong giant catfish, "Pangasianodon gigas" (, ; /"try riec"/), is a very large, critically endangered species of catfish (order Siluriformes) in the shark catfish family (Pangasiidae), native to the Mekong basin in Southeast Asia and adjacent China. In Thai folklore, this fish is regarded with reverence, and special rituals are followed and offerings are made before fishing it., The domestic cat is a small, typically furry, carnivorous mammal. They are often called house cats when kept as indoor pets or simply cats when there is no need to distinguish them from other felids and felines. Cats are often valued by humans for companionship and for their ability to hunt vermin. There are more than 70 cat breeds, though different associations proclaim different numbers according to their standards., Seahorse is the name given to 54 species of small marine fishes in the genus Hippocampus. "Hippocampus" comes from the Ancient Greek word "hippos" meaning "horse" and "kampos" meaning "sea monster". The word "seahorse" can also be written as two separate words (sea horse), or hyphenated (sea-horse). Having a head and neck suggestive of a horse, seahorses also feature segmented bony armour, an upright posture and a curled prehensile tail., Corydoras is a genus of freshwater catfish in the family Callichthyidae and subfamily Corydoradinae. The species usually have more restricted areas of endemism than other callichthyids, but the area of distribution of the entire genus almost equals the area of distribution of the family, except for Panama where "Corydoras" is not present. "Corydoras" species are distributed in South America where found east of the Andes to the Atlantic coast, from Trinidad to the Río de la Plata drainage in northern Argentina. Species assigned to "Corydoras" display a broad diversity of body shapes and coloration. "Corydoras" are small fish, ranging from in SL., Birds (Aves), also known as avian dinosaurs, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. Birds live worldwide and range in size from the bee hummingbird to the ostrich. They rank as the class of tetrapods with the most living species, at approximately ten thousand, with more than half of these being passerines, sometimes known as perching birds or, less accurately, as songbirds., Mistletoe is the common name for most obligate hemiparasitic plants in the order Santalales. Mistletoes attach to and penetrate the branches of a tree or shrub by a structure called the haustorium, through which they absorb water and nutrients from the host plant., Loricariidae is the largest family of catfish (order Siluriformes), with 92 genera and just over 680 species to date, with new species being described each year. Loricariids originate from freshwater habitats of Costa Rica, Panama, and tropical and subtropical South America. These fish are noted for the bony plates covering their bodies and their suckermouths. Several genera are sold as "plecos", notably the suckermouth catfish, "Hypostomus plecostomus", and are popular as aquarium fish., The wrasses are a family, Labridae, of marine fish, many of which are brightly colored. The family is large and diverse, with over 600 species in 82 genera, which are divided into 9 subgroups or tribes.
They are typically small fish, most of them less than long, although the largest, the humphead wrasse, can measure up to . They are efficient carnivores, feeding on a wide range of small invertebrates. Many smaller wrasses follow the feeding trails of larger fish, picking up invertebrates disturbed by their passing. Juveniles of some representatives of the genera "Bodianus", "Epibulus","Cirrhilabrus", "Oxycheilinus", and "Paracheilinus" hide among the tentacles of the free-living mushroom coral "Heliofungia actiniformis"., A fish is any member of a group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered obsolete or paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term "fish" is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a typological, but not a phylogenetic classification., A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea., Hagfish, the class Myxini (also known as Hyperotreti), are eel-shaped, slime-producing marine fish (occasionally called slime eels). They are the only known living animals that have a skull but no vertebral column. Along with lampreys, hagfish are jawless; they are the sister group to vertebrates, and living hagfish remain similar to hagfish from around 300 million years ago., Cleaner fish are fish that provide a service to other fish species by removing dead skin and ectoparasites . This cleaning symbiosis is an example of mutualism , an ecological interaction that benefits both parties involved . However , the cleaner fish may sometimes cheat and consume mucus or tissue , thus creating a form of parasitism . A wide variety of fishes including wrasse , cichlids , catfish , pipefish , and gobies display cleaning behaviors . Similar behavior is found in other groups of animals , such as cleaner shrimps . Cleaner fish advertise their services with conspicuous coloration , often displaying a brilliant blue stripe that spans the length of the body . This adaptation has evolved independently in different species of cleaner fish , making it an example of convergent evolution . Other species of fish , called mimics , imitate the behavior and phenotype of cleaner fish to gain access to client fish tissue . This is another example of convergent evolution ., A lichen is a composite organism that arises from algae and/or cyanobacteria living among filaments of multiple fungi in a symbiotic relationship. The combined life form has properties that are very different from the properties of its component organisms. Lichens come in many colours, sizes, and forms. The properties are sometimes plant-like, but lichens are not plants. Lichens may have tiny, leafless branches (fruticose), flat leaf-like structures (foliose), flakes that lie on the surface like peeling paint (crustose), or other growth forms. A macrolichen is a lichen that is either bush-like or leafy; all other lichens are termed microlichens. Here, "macro" and "micro" do not refer to size, but to the growth form. Common names for lichens may contain the word "moss" (e.g., "Reindeer moss", "Iceland moss"), and lichens may superficially look like and grow with mosses, but lichens are not related to mosses or any plant. Lichens do not have roots that absorb water and nutrients as plants do but like plants they produce their own food by photosynthesis using solar energy, from carbon dioxide, water and minerals in their environment. When they grow on plants, they do not live as parasites but instead use the plants as a substrate., A craniate is a member of Craniata (sometimes Craniota), a proposed clade of chordate animals that contains the Myxini (hagfish), Petromyzontida (including lampreys), and the much more numerous Gnathostomata (jawed vertebrates) as living representatives. As the name suggests, craniates are animals with a (hard bone or cartilage) skull in phylum Chordata., Interaction is a kind of action that occurs as two or more objects have an effect upon one another. The idea of a two-way effect is essential in the concept of interaction, as opposed to a one-way causal effect. A closely related term is interconnectivity, which deals with the interactions of interactions within systems: combinations of many simple interactions can lead to surprising emergent phenomena. "Interaction" has different tailored meanings in various sciences. Changes can also involve interaction., Subject: cleaner fish, Relation: parent_taxon, Options: (A) amniota (B) amphibia (C) animal (D) areas (E) babirusa (F) bacteria (G) bodianus (H) cheilinus (I) chordata (J) cirrhilabrus (K) corydoradinae (L) corydoras (M) craniata (N) cuscuta (O) cyanobacteria (P) formicidae (Q) fungi (R) hagfish (S) hermit (T) hippocampus (U) human (V) hymenoptera (W) hypostomus (X) idea (Y) insects (Z) la ([) labridae (\) lampetra (]) loricariidae (^) mammal (_) metazoa (`) moss (a) nematode (b) olfactores (c) ostrich (d) oxycheilinus (e) pangasianodon (f) paracheilinus (g) peccary (h) petromyzontiformes (i) pig (j) plant (k) protozoa (l) reindeer (m) reptile (n) santalales (o) sauropsida (p) shark catfish (q) siluriformes (r) silurus (s) suidae (t) syngnathidae (u) tetrapoda (v) trichomycteridae (w) tunicate (x) vandellia (y) vertebrata (z) virus ({) wild boar

labridae