Context: 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., 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 ("Pireás" , , "Peiraieús") 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
Output: center