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).

Example Input: Context: 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. , Athens ("Athína" ) 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., 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., Maria Lvovna Kalmykova ( Russian :    ) ( born 14 January 1978 in Ryazan ) is a Russian basketball player who competed for the Russian National Team at the 2004 Summer Olympics , winning the bronze medal ., Ryazan is a city and the administrative center of Ryazan Oblast, Russia, located on the Oka River southeast of Moscow. Population: , Ryazan Oblast is a federal subject of Russia (an oblast). Its administrative center is the city of Ryazan, which is the oblast's largest city. Population: 1,154,114 (2010 Census)., The 2004 Summer Olympic Games, officially known as the Games of the XXVIII Olympiad and commonly known as Athens 2004, was a premier international multi-sport event held in Athens, Greece, from 13 to 29 August 2004 with the motto "Welcome Home." 10,625 athletes competed, some 600 more than expected, accompanied by 5,501 team officials from 201 countries. There were 301 medal events in 28 different sports. Athens 2004 marked the first time since the 1996 Summer Olympics that all countries with a National Olympic Committee were in attendance. 2004 marked the return of the games to the city where they began., Nizhny Novgorod, colloquially shortened to Nizhny, is a city in the administrative center of Nizhny Novgorod Oblast and Volga Federal District in Russia. From 1932 to 1990, it was known as Gorky, after the writer Maxim Gorky, who was born there. The city is an important economic, transportation, scientific, educational and cultural center in Russia and the vast Volga-Vyatka economic region, and is the main center of river tourism in Russia. In the historical part of the city there are a large number of universities, theaters, museums and churches. Nizhny Novgorod is located about 400 km east of Moscow, where the Oka empties into the Volga. Population: , Subject: maria kalmykova, Relation: position_played_on_team_/_speciality, Options: (A) center (B) centre (C) end
Example Output: center

Example Input: 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 Lwów. 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 Lwów and was the centre of the Lwów 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
Example Output: western bug

Example Input: Context: Zine El Abidine Ben Ali (""; born 3 September 1936) was the second President of Tunisia from 1987 to 2011, being in the position for 23 years. Ben Ali was appointed Prime Minister in October 1987, and he assumed the Presidency on 7 November 1987 in a bloodless coup d'état that ousted President Habib Bourguiba, who was declared incompetent. Ben Ali was subsequently reelected with enormous majorities, each time exceeding 90% of the vote; the final re-election was on 25 October 2009., A prime minister is the most senior minister of cabinet in the executive branch of government, often in a parliamentary or semi-presidential system. In many systems, the prime minister selects and may dismiss other members of the cabinet, and allocates posts to members within the government. In most systems, the prime minister is the presiding member and chairman of the cabinet. In a minority of systems, notably in semi-presidential systems of government, a prime minister is the official who is appointed to manage the civil service and execute the directives of the head of state.
In parliamentary systems fashioned after the Westminster system, the prime minister is the presiding and actual head of government and head of the executive branch. In such systems, the head of state or the head of state's official representative (i.e. the monarch, president, or governor-general) usually holds a largely ceremonial position, although often with reserve powers., The Socialist Destourian Party ( Tunisian Arabic :     izb el - Ishtirk ed - Dostr ; French : Parti socialiste destourien ) was the ruling political party of Tunisia from 1964 to 1988 . Bahi Ladgham was the first Prime Minister from the party and Hédi Baccouche was the last . It was founded on 22 October 1964 and disbanded on 27 February 1988 . Habib Bourgiba was the first president of the Socialist Destourian Party 1964 -- 1987 . He was succeeded by Zine El Abidine Ben Ali 1987 -- 1988 ., Hammam Sousse is a coastal town in north-eastern Tunisia. It is located north of Sousse, at around . It has about 42,691 inhabitants (2014 est.). Former President Zine el Abidine Ben Ali and the minister of defense, Kamel Morjane, were born in this town., Hédi Baccouche (born 15 January 1930) was the Prime Minister of Tunisia from November 7, 1987 to September 27, 1989. Baccouche led the Socialist Destourian Party until it changed its name to the Constitutional Democratic Rally in 1988. He was born in Hammam Sousse., Algeria (' "Dzayer"), officially the People's Democratic Republic of Algeria, is a sovereign state in North Africa on the Mediterranean coast. Its capital and most populous city is Algiers, located in the country's far north. With an area of , Algeria is the tenth-largest country in the world, and the largest in Africa. Algeria is bordered to the northeast by Tunisia, to the east by Libya, to the west by Morocco, to the southwest by the Western Saharan territory, Mauritania, and Mali, to the southeast by Niger, and to the north by the Mediterranean Sea. The country is a semi-presidential republic consisting of 48 provinces and 1,541 communes (counties). Abdelaziz Bouteflika has been President since 1999., A head of state (or chief of state) is the public persona that officially represents the national unity and legitimacy of a sovereign state. In developing the current Constitution of France (1958), former French president Charles de Gaulle said the head of state should embody "the spirit of the nation" (""). In some countries, typically those with parliamentary governments, the head of state is a ceremonial figurehead that does not actually guide day-to-day government activities and may not even be empowered to exercise any kind of political authority (e.g., Queen Elizabeth II in the United Kingdom). In other countries, the head of state is also the head of government, such as in the U.S., where the president is both a public figurehead and the actual highest ranking political leader who, in practice, oversees the executive branch., Tunisia ('; ), officially the Republic of Tunisia (') is the northernmost country in Africa, covering . Its northernmost point, Cape Angela, is the northernmost point on the African continent. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia's population was estimated to be just under 11 million in 2014. Tunisia's name is derived from its capital city, Tunis, which is located on Tunisia's northeast coast., Subject: socialist destourian party, Relation: chairperson, Options: (A) abdelaziz bouteflika (B) charles de gaulle (C) elizabeth ii (D) general (E) habib bourguiba (F) zine el abidine ben ali
Example Output:
habib bourguiba