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).

Input: Consider Input: Context: Chicago Transit Authority, also known as CTA, is the operator of mass transit in Chicago, Illinois and some of its surrounding suburbs, including the trains of the Chicago "L" and CTA bus service., The Chicago Surface Lines (CSL) was operator of the street railway system of Chicago, Illinois, from the years 1913 to 1947. The firm is a predecessor of today's publicly owned operator, the Chicago Transit Authority., 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 Chicago metropolitan area, or Chicagoland, is the metropolitan area associated with the city of Chicago, Illinois, and its suburbs. With an estimated population of 9.4 million people, it is the third largest metropolitan area in the United States. Chicagoland is the area that is closely linked to the city through geographic, social, economic, and cultural ties., A county is a geographical region of a country used for administrative or other purposes, in certain modern nations. The term is derived from the Old French "conté" or "cunté" denoting a jurisdiction under the sovereignty of a count (earl) or a viscount. The modern French is "comté", and its equivalents in other languages are "contea", "contado", "comtat", "condado", "Grafschaft", "graafschap", "Gau", etc. (cf. "conte", "comte", "conde", "Graf")., The Midwestern United States, also referred to as the American Midwest or simply the Midwest, is one of the four geographic regions defined by the United States Census Bureau, occupying the northern central part of the United States of America. It was officially named the North Central region by the Census Bureau until 1984., Chicago (or ), officially the City of Chicago, is the third-most populous city in the United States, and the fifth-most populous city in North America. With over 2.7 million residents, it is the most populous city in the state of Illinois and the Midwestern United States, and the county seat of Cook County. The Chicago metropolitan area, often referred to as Chicagoland, has nearly 10 million people and is the third-largest in the U.S., Illinois is a state in the midwestern region of the United States, achieving statehood in 1818. It is the 5th most populous state and 25th largest state in terms of land area, and is often noted as a microcosm of the entire country. The word "Illinois" comes from the Algonquin word for "tribe of superior men". With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal, timber, and petroleum in the south, Illinois has a diverse economic base and is a major transportation hub. The Port of Chicago connects the state to other global ports from the Great Lakes, via the Saint Lawrence Seaway, to the Atlantic Ocean, as well as the Great Lakes to the Mississippi River, via the Illinois River. For decades, O'Hare International Airport has been ranked as one of the world's busiest airports. Illinois has long had a reputation as a bellwether both in social and cultural terms and politics., The Chicago City Railway Company ( CCRy ) was an urban transit company that operated horse , cable , and electric streetcars on Chicago 's South Side between 1859 and 1914 , when it became merged into and part of the Chicago Surface Lines ( CSL ) metropolitan - wide system . After that time it owned electric streetcars , along with gasoline , diesel , and propane - fueled transit busses . Purchased by the government agency Chicago Transit Authority ( CTA ) in 1947 , it was liquidated in 1950 ., Subject: chicago city railway, Relation: instance_of, Options: (A) airport (B) area (C) base (D) bus (E) city (F) continent (G) county (H) earl (I) four (J) geographical (K) jurisdiction (L) mass (M) metropolitan (N) metropolitan area (O) ocean (P) operator (Q) part (R) politics (S) railway system (T) region (U) river (V) sea (W) service (X) state (Y) surface (Z) system ([) the city (\) united states census

Output: railway system


Input: Consider Input: Context: 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 ., Gwen Renée Stefani (born October 3, 1969) is an American singer, songwriter, and fashion designer. She is the co-founder and lead vocalist of the band No Doubt that experienced major success after their breakthrough studio album "Tragic Kingdom" (1995) along with various successful singles, including "Just a Girl", "Don't Speak", "Hey Baby", and "It's My Life". During the band's hiatus, Stefani embarked on a solo pop career in 2004 by releasing her debut studio album "Love. Angel. Music. Baby." Inspired by pop music from the 1980s, the album was met with both critical and commercial success. It spawned three commercially successful singles: "What You Waiting For?", "Rich Girl", and "Hollaback Girl", the latter reached number one on the "Billboard" Hot 100 while also becoming the first US download to sell one million copies. In 2006 Stefani released her second studio album "The Sweet Escape". The album produced two successful singles: "Wind It Up" and the album's title track "The Sweet Escape". Her third solo album "This Is What the Truth Feels Like" was released in March 2016 and became her first solo number-one album on the "Billboard" 200., Jimmy Harry is an American Golden Globe winning songwriter, producer, and multi-instrumentalist who currently resides in Los Angeles, California. Harry has worked with artists such as Madonna, Pink, Weezer, Kylie Minogue, Kelly Clarkson, Fischerspooner, Oh Land, and Santana. Recognized at the 2012 Golden Globes by the Hollywood Foreign Press Association, he won "Best Original Song" with Madonna and Julie Frost for the song "Masterpiece". In 2010 his production of Pink's "Sober" was nominated for a Grammy for "Best Female Pop Vocal Performance", and he also wrote and produced "Funhouse", the title track of her release nominated in the category "Best Pop Album". Jimmy received recognition from the Academy of Canadian Cinema & Television at the 2014 Canadian Screen Awards where he and Serena Ryder won "Best Original Song" for the song "It's No Mistake" from the film "The Right Kind of Wrong"., Kelly Brianne Clarkson (born April 24, 1982) is an American singer, songwriter, actress and author. She rose to fame in 2002 after winning the first season of "American Idol", and has since been referred to as the "Original American Idol" and the "Queen of Covers". She also became the runner-up of "World Idol" the following year. Signing with RCA Records, Clarkson released her debut single, "A Moment Like This", which topped the "Billboard" Hot 100 chart and became the best-selling single of 2002 in the United States. Her debut studio album, "Thankful" (2003), debuted at number one on the "Billboard" 200 and was certified double platinum by the Recording Industry Association of America (RIAA). Its lead single, "Miss Independent", was a top-ten hit in various nations., 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., A composer (Latin "compn"; literally "one who puts together") is a person who creates or writes music, which can be vocal music (for a singer or choir), instrumental music (e.g., for solo piano, string quartet, wind quintet or orchestra) or music which combines both instruments and voices (e.g., opera or art song, which is a singer accompanied by a pianist). The core meaning of the term refers to individuals who have contributed to the tradition of Western classical music through creation of works expressed in written musical notation (e.g., sheet music scores)., Pop rock is rock music with a lighter, smoother approach that is more reminiscent of commercial pop music. Originating in the 1950s as an alternative to rock and roll, early pop rock was influenced by the beat, arrangements, and style of rock and roll (and sometimes doo wop), but placed a greater emphasis on professional songwriting and recording craft. The detractors of pop rock often deride it as a slick, commercial product, less authentic than rock music., Serena Ryder (born December 8, 1982) is a Canadian musician. Born in Toronto, she grew up in Millbrook, Ontario. Ryder first gained national recognition with her ballad "Weak in the Knees" in 2007. An accomplished songwriter and musician, she also possesses a three-octave vocal range and is considered a mezzo-soprano. Her timbre has been described as slightly nasal with a raspy lower register., Power pop is a popular musical genre that draws its inspiration from 1960s British and American rock music. It typically incorporates a combination of musical devices such as strong melodies, clear vocals and crisp vocal harmonies, economical arrangements and prominent guitar riffs. Instrumental solos are usually kept to a minimum, and blues elements are largely downplayed., Singer-songwriters are musicians who write, compose, and perform their own musical material, including lyrics and melodies., Weezer is an American rock band formed in Los Angeles in 1992, consisting of Rivers Cuomo (lead vocals, guitar), Patrick Wilson (drums), Brian Bell (guitar, backing vocals, keyboards), and Scott Shriner (bass guitar, backing vocals). Weezer has sold 9.2 million albums in the US and over 17 million worldwide., No Doubt is an American rock band from Anaheim, California, that formed in 1986. Since 1994, the group has consisted of vocalist Gwen Stefani, bassist and keyboardist Tony Kanal, guitarist and keyboardist Tom Dumont, and drummer Adrian Young. Since the mid-1990s in live performances and the studio, they have been supported by keyboardist and trombonist Gabrial McNair and keyboardist and trumpeter Stephen Bradley., Reggae is a music genre that originated in Jamaica in the late 1960s. The term also denotes the modern popular music of Jamaica and its diaspora. A 1968 single by Toots and the Maytals "Do the Reggay" was the first popular song to use the word "reggae," effectively naming the genre and introducing it to a global audience. While sometimes used in a broad sense to refer to most types of popular Jamaican dance music, the term "reggae" more properly denotes a particular music style that was strongly influenced by traditional mento as well as American jazz and rhythm and blues, especially the New Orleans R&B practiced by Fats Domino and Allen Toussaint, and evolved out of the earlier genres ska and rocksteady. Reggae usually relates news, social gossip, and political comment. Reggae spread into a commercialized jazz field, being known first as Rudie Blues, then Ska, later Blue Beat, and Rock Steady. It is instantly recognizable from the counterpoint between the bass and drum downbeat, and the offbeat rhythm section. The immediate origins of reggae were in ska and rock steady; from the latter, reggae took over the use of the bass as a percussion instrument., Elan Atias (born September 21, 1975) is an American Jewish, singer/songwriter, reggae singer., Fischerspooner is an electroclash duo and performance troupe formed in 1998 in New York City. The name is a combination of the founders' last names, Warren Fischer and Casey Spooner. Influenced by retro electropop tendencies (arguably similar to Kraftwerk, early Pet Shop Boys, and Gary Numan) Fischerspooner uses a modern approach to programming., Kylie Ann Minogue, OBE (born 28 May 1968), often known simply as Kylie, is an Australian singer, songwriter, dancer and actress. She achieved recognition starring in the Australian soap opera "Neighbours", where she played tomboy mechanic Charlene Robinson. Appearing in the series for two years, Minogue's character married Scott Robinson (Jason Donovan) in an episode viewed by nearly 20 million people in the United Kingdom making it one of the most watched Australian TV episodes ever. Since then, Minogue has been a recording artist and has achieved commercial success and critical acclaim in the entertainment industry. Minogue has been recognised with several honorific nicknames including "Princess of Pop" and "Goddess of Pop". She is recognised as the highest-selling Australian artist of all time by the Australian Recording Industry Association (ARIA)., The Hollywood Foreign Press Association (HFPA) is a non-profit organization of journalists and photographers that reports on the entertainment industry activity and interests in the United States for information outlets (newspaper, magazine and book publication, television and radio broadcasting) predominantly outside the U.S. The HFPA consists of about 90 members from approximately 55 countries with a combined following of more than 250 million. It conducts the annual Golden Globe Awards ceremony in Los Angeles every January that honor notable examples of cinema and television and achievements in entertainment businesses., Tony Ashwin Kanal (born 27 August 1970) is a British-American musician, record producer and songwriter. Kanal is the bassist for the American rock band No Doubt. His musical work outside of the band includes producing and songwriting with artists such as reggae singer Elan Atias and No Doubt bandmate Gwen Stefani, among others., Kara Elizabeth DioGuardi (born December 9, 1970) is an American singer-songwriter, record producer, music publisher, A&R executive, composer and TV personality. She writes music primarily in the pop rock genre. DioGuardi has worked with many popular artists; sales of albums on which her songs appear exceed 160 million worldwide. DioGuardi is a Grammy and Emmy-nominated writer. She's a 2011 NAMM Music For Life Award winner, 2009 NMPA Songwriter Icon Award winner, 2007 BMI Pop Songwriter of the Year, and has received 20 BMI Awards for co-writing the most performed songs on the radio., `` Sober '' is a song by the American singer - songwriter Pink , taken from her fifth studio album , Funhouse ( 2008 ) . It was written by Pink and Kara DioGuardi , with additional writing by Nate `` Danja '' Hills and Marcella Araica , while production was done by Danja , Tony Kanal and Jimmy Harry . The song was released as the album 's second single on October 31 , 2008 , firstly through digital download and later was added to U.S. radio stations on December 1 , 2008 . The power pop song talks about the quiet sense of comfort in being sober , with the singer claiming it was about the vices that we choose . The song received generally favorable reviews from music critics , who commended the track for being a heartfelt track , with some praising its lyrical content . However , few critics dismissed the track , calling it `` more of the same '' from her previous music . Furthermore , the song received a Grammy Award for Best Female Pop Vocal Performance in 2010 . Commercially , `` Sober '' attained success on the charts , reaching the top - ten in over thirteen countries , while reaching the top - twenty in the U.S. , as well as the top of Billboard 's Adult Top 40 chart . A music video for the track was directed by Jonas Akerlund and it finds Pink at a party with her doppelgänger . ``, Blues is a genre and musical form originated by African Americans in the Deep South of the United States around the end of the 19th century. The genre developed from roots in African musical traditions, African-American work songs and European-American folk music. Blues incorporated spirituals, work songs, field hollers, shouts, chants, and rhymed simple narrative ballads. The blues form, ubiquitous in jazz, rhythm and blues and rock and roll, is characterized by the call-and-response pattern, the blues scale and specific chord progressions, of which the twelve-bar blues is the most common. Blue notes (or "worried notes"), usually thirds or fifths flattened in pitch, are also an essential part of the sound. Blues shuffles or walking bass reinforce the trance-like rhythm and form a repetitive effect known as the groove., Subject: sober , Relation: genre, Options: (A) album (B) ballad (C) blues (D) book (E) country (F) dance (G) electroclash (H) electropop (I) entertainment (J) fashion (K) genre (L) information (M) instrumental (N) jazz (O) magazine (P) march (Q) music (R) musical (S) news (T) opera (U) pop rock (V) power pop (W) reggae (X) rhythm (Y) rhythm and blues (Z) rock ([) rock and roll (\) ska (]) soap opera (^) song (_) television (`) vocal music (a) western

Output: pop rock


Input: Consider Input: Context: Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is an ionic salt called calcium carbonate or CaCO. It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells (coccoliths) shed from micro-organisms called coccolithophores. Flint (a type of chert unique to chalk) is very common as bands parallel to the bedding or as nodules embedded in chalk. It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction. Flint is often deposited around larger fossils such as Echinoidea which may be silicified (i.e. replaced molecule by molecule by flint)., The Arctic Ocean is the smallest and shallowest of the world's five major oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea or simply the Arctic Sea, classifying it a mediterranean sea or an estuary of the Atlantic Ocean. Alternatively, the Arctic Ocean can be seen as the northernmost part of the all-encompassing World Ocean., 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"., Metatheria is a mammalian clade that includes all mammals more closely related to marsupials than to placentals (such as sparassodontans). First proposed by Thomas Henry Huxley in 1880, it is a slightly more inclusive group than the marsupials; it contains all of the living mammals with abdominal pouches (most female marsupials) as well as their more primitive ancestors and relatives. Metatherians are one of three main classes of extant mammals: monotremes (egg laying mammals like the platypus and the echidna), metatheria (or marsupials, which includes the three American orders (Didelphimorphia, Paucituberculata and Microbiotheria) and the four Australasian orders (Notoryctemorphia, Dasyuromorphia, Peramelemorphia and Diprotodontia)), and the eutherians (or placental mammals) consisting of twenty-one orders, divided into four superorders. Metatherians belong to a subgroup of the northern tribosphenic mammal clade or Boreosphenida. They differ from all other mammals in certain morphologies like their dental formula, which includes about five upper and four lower incisors, a canine, three premolars, and four molars. Other morphologies include skeletal and anterior dentition, such as wrist and ankle apomorphies; all metatherians share derived pedal characters and calcaneal features., Didelphodon ( meaning `` two womb tooth '' ) is a genus of stagodont metatherians from the Late Cretaceous of North America ., 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., The Paleogene (or ; also spelled Palaeogene or Palæogene; informally Lower Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (Mya) to the beginning of the Neogene Period Mya. It is the beginning of the Cenozoic Era of the present Phanerozoic Eon. The Paleogene is most notable for being the time during which mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of the CretaceousPaleogene extinction event that ended the preceding Cretaceous Period. , 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. , Sparassodonta is an extinct order of carnivorous metatherian mammals native to South America. They were once considered to be true marsupials, but are now thought to be either a sister taxon to them, or considerably distantly related, part of a separate clade of Gondwanan metatherians. A number of these mammalian predators closely resemble placental predators that evolved separately on other continents, and are cited frequently as examples of convergent evolution. They were first described by Florentino Ameghino, from fossils found in the Santa Cruz beds of Patagonia. Sparassodonts were present throughout South America's long period of "splendid isolation" during the Cenozoic; during this time they shared the niches for large warm-blooded predators with the flightless terror birds. Previously, it was thought that these mammals died out in the face of competition from "more competitive" placental carnivorans during the Pliocene Great American Interchange, but more recent research has showed that sparassodonts died out long before eutherian carnivores arrived in South America (aside from procyonids)., 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., 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., 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 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., The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period million years ago (Mya) to the beginning of the Paleogene Period Mya. It is the last period of the Mesozoic Era. The Cretaceous Period is usually abbreviated K, for its German translation "Kreide" (chalk)., 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 December 21 UTC) to the March Equinox (typically March 20 UTC), while summer lasts from the June solstice (typically June 21 UTC) through to the September equinox (typically September 23 UTC). The dates vary each year due to the difference between the calendar year and the astronomical year., The Jurassic (from Jura Mountains) is a geologic period and system that spans 56.3 million years from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period Mya. The Jurassic constitutes the middle period of the Mesozoic Era, also known as the Age of Reptiles. The start of the period is marked by the major TriassicJurassic extinction event. Two other extinction events occurred during the period: the Pliensbachian/Toarcian event in the Early Jurassic, and the Tithonian event at the end; however, neither event ranks among the "Big Five" mass extinctions., 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 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., Subject: didelphodon, Relation: instance_of, Options: (A) age (B) brazil (C) chert (D) continent (E) convention (F) era (G) event (H) extinction event (I) five (J) geographical (K) geology (L) group (M) gulf (N) limestone (O) march (P) mediterranean sea (Q) model (R) ocean (S) organization (T) period (U) plane (V) pole (W) prime meridian (X) reference (Y) region (Z) rock ([) salt (\) sea (]) size (^) solstice (_) surface (`) system (a) taxon (b) term (c) time (d) two


Output: taxon