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 Q]: Context: Athens ("Athina" ) is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world's oldest cities, with its recorded history spanning over 3,400 years, and its earliest human presence starting somewhere between the 11th and 7th millennia BC. Classical Athens was a powerful city-state that emerged in conjunction with the seagoing development of the port of Piraeus, which had been a distinct city prior to its 5th century BC incorporation with Athens. A centre for the arts, learning and philosophy, home of Plato's Academy and Aristotle's Lyceum, it is widely referred to as the cradle of Western civilization and the birthplace of democracy, largely because of its cultural and political impact on the European continent, and in particular the Romans. In modern times, Athens is a large cosmopolitan metropolis and central to economic, financial, industrial, maritime, political and cultural life in Greece. In 2015, Athens was ranked the world's 29th richest city by purchasing power and the 67th most expensive in a UBS study., Basketball is a sport that is played by two teams of five players on a rectangular court. The objective is to shoot a ball through a hoop in diameter and mounted at a height of to backboards at each end of the court. The game was invented in 1891 by Dr. James Naismith, who would be the first basketball coach of the Kansas Jayhawks, one of the most successful programs in the game's history. , The Greek Basket League (GBL), often referred to as the Greek Basketball League, Greek A1 Basketball League, or Greek Basketball Championship (originally called Panhellenic Basketball Championship), is the 1st tier professional basketball league in Greece. It is run by HEBA (Greek: ), under the legal authority of the Hellenic Basketball Federation (E.O.K.). The league is also known as the Stoiximan.gr Greek Basket League for sponsorship reasons., Piraeus ("Pireas" , , "Peiraieus") is a port city in the region of Attica, Greece. Piraeus is located within the Athens urban area, southwest from its city center (municipality of Athens), and lies along the east coast of the Saronic Gulf., A metropolis is a large city or conurbation which is a significant economic, political, and cultural center for a country or region, and an important hub for regional or international connections, commerce, and communications. The term is Greek and means the "mother city" of a colony (in the ancient sense), that is, the city which sent out settlers. This was later generalized to a city regarded as a center of a specified activity, or any large, important city in a nation., The city of Athens during the classical period of Ancient Greece (508322 BC) was the major urban center of the notable polis (city-state) of the same name, located in Attica, Greece, leading the Delian League in the Peloponnesian War against Sparta and the Peloponnesian League. Athenian democracy was established in 508 BC under Cleisthenes following the tyranny of Isagoras. This system remained remarkably stable, and with a few brief interruptions remained in place for 180 years, until 322 BC (aftermath of Lamian War). The peak of Athenian hegemony was achieved in the 440s to 430s BC, known as the Age of Pericles., Christos Tsekos ( Greek : ; born April 4 , 1966 in Athens , Greece ) is a retired Greek professional basketball player . He played professionally in the Greek Basket League and has represented Greece at senior level ., Subject: christos tsekos , Relation: position_played_on_team_/_speciality, Options: (A) center (B) centre (C) end
[EX A]: center

[EX Q]: Context: The Poltva River ( Ukrainian : ; Polish : Petew ) is a river in the western Ukrainian Oblast of Lviv and a tributary of the Bug River . The capital of the Lviv Oblast , Lviv , is located on the river . In the 19th century the river was included into the underground sewer system of Lviv ., The Second Polish Republic, also known as the Second Commonwealth of Poland or interwar Poland, refers to the country of Poland between the First and Second World Wars (19181939). Officially known as the Republic of Poland or the Commonwealth of Poland, the Polish state was recreated in 1918, in the aftermath of World War I. When, after several regional conflicts, the borders of the state were fixed in 1922, Poland's neighbours were Czechoslovakia, Germany, the Free City of Danzig, Lithuania, Latvia, Romania and the Soviet Union. It had access to the Baltic Sea via a short strip of coastline either side of the city of Gdynia. Between March and August 1939, Poland also shared a border with the then-Hungarian governorate of Subcarpathia. Despite internal and external pressures, it continued to exist until 1939, when Poland was invaded by Nazi Germany, the Soviet Union and the Slovak Republic, marking the beginning of World War II in Europe. The Second Republic was significantly different in territory to the current Polish state. It included substantially more territory in the east and less in the west., The Bug River (or Western Bug "Zakhidnyy Buh, ") is a major European river which flows through three countries with a total length of ., Lviv (', ', ; Yiddish: ; Latin: "Leopolis"), the largest city in western Ukraine and the seventh largest city in the country overall, is one of the main cultural centres of Ukraine. Named in honor of the Leo, the eldest son of Rus' King Daniel of Galicia. It was the capital of the Kingdom of GaliciaVolhynia (also called Kingdom of Rus') from 1272 to 1349, when it was conquered by King Casimir III the Great who then became known as the King of Poland and Rus'. From 1434, it was the regional capital of the Ruthenian Voivodeship in the Kingdom of Poland and was known as Lwow. In 1772, after the First partition of Poland, the city became the capital of the Habsburg Kingdom of Galicia and Lodomeria and was renamed to Lemberg. In 1918 in a short time was the capital of the West Ukrainian People's Republic. Between the wars, the city was known again as Lwow and was the centre of the Lwow Voivodeship in the Second Polish Republic. After World War II, it became part of the Soviet Union (Ukrainian SSR) and in 1991 of independent Ukraine.
Administratively, Lviv serves as the administrative center of Lviv Oblast and has the status of city of oblast significance. Its population is ., Ukraine (tr. ) is a sovereign state in Eastern Europe, bordered by Russia to the east and northeast, Belarus to the northwest, Poland and Slovakia to the west, Hungary, Romania, and Moldova to the southwest, and the Black Sea and Sea of Azov to the south and southeast, respectively. Ukraine is currently in territorial dispute with Russia over the Crimean Peninsula which Russia annexed in 2014 but which Ukraine and most of the international community recognise as Ukrainian. Including Crimea, Ukraine has an area of , making it the largest country entirely within Europe and the 46th largest country in the world. It has a population of about 44.5 million, making it the 32nd most populous country in the world., Subject: poltva river, Relation: mouth_of_the_watercourse, Options: (A) main (B) sea (C) sea of azov (D) western bug
[EX A]: western bug

[EX Q]: Context: '' S.O.S. ( Let the Music Play ) '' is a song performed by American R&B and pop recording artist Jordin Sparks . It is the second single from her second studio album titled , Battlefield . The song was released first in New Zealand on August 14 , 2009 and was sent to US radio on September 29 , 2009 . It was released in the United Kingdom on October 12 , 2009 . '' S.O.S. ( Let the Music Play ) '' is an uptempo electropop song which contains a sample of '' Let the Music Play '' by Shannon . It combines 1980s synths with modern techno - dance beats . Sparks explained why she decided to go in a dancier direction with this song : '' I 'll always be the ballad girl from American Idol , but I wanted to try something new , though not so far that people would n't believe me . '' The video was shot in Los Angeles , California on August 10 , 2009 , with Chris Robinson serving as the director . He also worked with Sparks on the '' No Air '' music video . As of May 2014 , the single has sold 111,000 digital downloads in the United States ., American Idol is an American singing competition television series created by Simon Fuller, produced by FremantleMedia North America and 19 Entertainment, and distributed by FremantleMedia North America. It began airing on Fox on June 11, 2002, and ended on April 7, 2016. It started off as an addition to the "Idols" format based on the British series "Pop Idol", and became one of the most successful shows in the history of American television. The concept of the series involves discovering recording stars from unsigned singing talents, with the winner determined by the viewers in America through telephones, Internet, and SMS text voting. Winners chosen by viewers in its fifteen seasons were Kelly Clarkson, Ruben Studdard, Fantasia Barrino, Carrie Underwood, Taylor Hicks, Jordin Sparks, David Cook, Kris Allen, Lee DeWyze, Scotty McCreery, Phillip Phillips, Candice Glover, Caleb Johnson, Nick Fradiani, and Trent Harmon., "No Air" is a song by American recording artist Jordin Sparks and American R&B singer/actor Chris Brown. The song was written by James Fauntleroy II, Eric Griggs, Mike Scala, Harvey Mason, Jr., Damon Thomas and Steve Russell. It was released in the United States on February 11, 2008 and serves as the second single from her self-titled debut album., The Recording Industry Association of America (RIAA) is a continental North and South American trade organization that represents the recording industry in the United States. Its members consist of record labels and distributors, which the RIAA says "create, manufacture and/or distribute approximately 85% of all legally sold recorded music in the United States." The RIAA headquarters is in Washington, D.C., Christopher Maurice "Chris" Brown (born May 5, 1989) is an American singer, songwriter, rapper, dancer, and actor. Born in Tappahannock, Virginia, he was involved in his church choir and several local talent shows from a young age. Having signed with Jive Records in 2004, Brown released his self-titled debut studio album the following year. It peaked at number two on the US "Billboard" 200 and was later certified double platinum by the Recording Industry Association of America (RIAA), selling an overall three million copies worldwide. With his first single "Run It!" peaking atop the US "Billboard" Hot 100, Brown became the first male artist as a lead since Diddy in 1997 to have his debut single top the chart. His second album "Exclusive" (2007) spawned his second Hot 100 number one "Kiss Kiss", in addition to "With You" and "Forever". The album was also certified double platinum by the RIAA. In addition to his solo commercial success, Brown has been featured on several singles such as "No Air", a duet with singer Jordin Sparks, "Shortie like Mine" with the rapper Bow Wow and "Shawty Get Loose" alongside Lil Mama and T-Pain. The songs have peaked at number three, number nine and number ten on the US "Billboard" Hot 100 respectively., A Grammy Award (originally called Gramophone Award), or Grammy, is an honor awarded by The Recording Academy to recognize outstanding achievement in the mainly English-language music industry. The annual presentation ceremony features performances by prominent artists, and the presentation of those awards that have a more popular interest. It shares recognition of the music industry as that of the other performance awards such as the Emmy Awards (television), the Tony Awards (stage performance), and the Academy Awards (motion pictures)., Jordin Brianna Sparks (born December 22, 1989) is an American singer, songwriter, and actress. She rose to fame in 2007 after winning the sixth season of "American Idol"; at age 16, she became the youngest winner in the series' history. Her self-titled debut studio album, released later that year, was certified platinum by the Recording Industry Association of America (RIAA) and has sold over two million copies worldwide. The album spawned the "Billboard" Hot 100 top-ten singles "Tattoo" and "No Air"; the latter, a collaboration with Chris Brown, is currently the third highest-selling single by any "American Idol" contestant, selling over three million digital copies in the United States. The song earned Sparks her first Grammy Award nomination for Best Pop Collaboration with Vocals., Subject: s.o.s. , Relation: record_label, Options: (A) 19 entertainment (B) album (C) digital (D) english (E) jive records (F) labels (G) pop (H) record
[EX A]:
jive records